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Dayang Chem (Hangzhou) Co.,Ltd.

As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem’s R&D center offer custom synthesis services. DayangChem can provide different quantities of custom synthesis

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Kilogram

FOB Price: $2.0

Type:Lab/Research institutions

inquiry

Simagchem Corporation

Welcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional JIT service with instant market intelligence in China to benefit our

High quality Bis-Tbdms-Trans-Calcipotriol supplier in China

Cas:112849-27-1

Min.Order:1 Metric Ton

Negotiable

Type:Manufacturers

inquiry

Hangzhou JINLAN Pharm-Drugs Technology Co., Ltd

We can provide GMP validation service that complies with SFDA, FDA, WHO and EU EMPA.Excellent registration team could help us easlily to register our products in different countries.If you and your customer are interested in some products or need CMO

Bis-TBDMS-trans-calcipotriol manufacturer/supplier

Cas:112849-27-1

Min.Order:1 Gram

Negotiable

Type:Manufacturers

inquiry

Hangzhou Think Chemical Co. Ltd

Calcipotriol / Calcipotriene CAS:112828-00-9/112965-21-6 Calcipotriol Monohydrate CAS:147657-22-5 Bis-TBDMS-trans-calcipotriol CAS:112849-27-1 (1alpha,3beta,5Z,7E,22E,24S)-24-Cyclopropyl-1,3-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]-9,10-secocho

Manufacture Calcipotriol Intermediate Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:10 Gram

Negotiable

Type:Other

inquiry

Henan Allgreen Chemical Co.,Ltd

high quality Appearance:White or off-white Solid Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea Port:shanghai

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Pound

Negotiable

Type:Manufacturers

inquiry

Ality Chemical Corporation

The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

Factory Supply Bis-Tbdms-Trans-Calcipotriol

Cas:112849-27-1

Min.Order:1

Negotiable

Type:Other

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Shanghai Seasonsgreen Chemical Co.,Ltd

Shanghai Seasonsgreen Chemical is a high-tech research and development, production, sale and custom synthesis set in one high-tech chemical products enterprises. Our sales and marketing division is located in Shanghai, serving international pharmaceu

lower price High quality Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Manufacturers

inquiry

Chemwill Asia Co., Ltd.

Our main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block

24-Cyclopropyl-1,3-bis-[[(1,1-dimethylethyl)-dimethylsilyl]-oxy]-9,10-secochola-5,7,10(19),22-tetraen-24-ol

Cas:112849-27-1

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

inquiry

Hebei Nengqian Chemical Import and Export Co., LTD

With our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements. Consistent Quality Our plant has strict quality control in each manufactu

Bis-TBDMS-trans-calcipotriol CAS 112849-27-1

Cas:112849-27-1

Min.Order:1 Kilogram

FOB Price: $1.0 / 10.0

Type:Trading Company

inquiry

Zhuozhou Wenxi import and Export Co., Ltd

WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et

Pharmaceutical Grade CAS 112849-27-1 with competitive price

Cas:112849-27-1

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Hebei yanxi chemical co.,LTD.

Hebei Yanxi Chemical Co., Ltd. is a professional research, development and production of lead acetate benzene acetamide enterprise backbone members by local well-known entrepreneurs and professional senior engineers in the party's "low car

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Metric Ton

FOB Price: $1.0 / 2.0

Type:Manufacturers

inquiry

Shanghai Upbio Tech Co.,Ltd

1.No Less 8 years exporting experience. Clients can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specialized

Bis-TBDMS-trans-calcipotriol 112849-27-1

Cas:112849-27-1

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Shandong Hanjiang Chemical Co., Ltd.

Hello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Changchun Artel lmport and Export trade company

Minimum Order Qty. 10 Gram Supply Ability 500 Kilograms/Month Storage store in cool, dry, ventilated place 20℃ Delivery Time 3 business days after payment Payment Term TT,western union,Paypal,MoneyGram Package 10g,20g,50g,100g,500g,1KGS,

Bis-TBDMS-trans-calcipotriol supplier in China CAS NO.112849-27-1

Cas:112849-27-1

Min.Order:10 Gram

Negotiable

Type:Trading Company

inquiry

Henan Wentao Chemical Product Co., Ltd.

Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Keyingchem Co.,Ltd

Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou J&H Chemical Co., Ltd.

J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia

Bis-Tbdms-Trans-Calcipotriol

Cas:112849-27-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Zibo Hangyu Biotechnology Development Co., Ltd

Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi

High quality Bis-Tbdms-Trans-Calcipotriol

Cas:112849-27-1

Min.Order:10 Gram

FOB Price: $100.0

Type:Lab/Research institutions

inquiry

Chemvon Biotechnology Co. Ltd.

Chemvon Biotechnology is one of the leading high-technology manufacturer in the field of pharmaceutical and fine chemical industry. high purity Bis-TBDMS-trans-calcipotriol good supplier in China From origins as a research group in technology se

high purity Bis-TBDMS-trans-calcipotriol good supplier in China

Cas:112849-27-1

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Henan Tianfu Chemical Co., Ltd.

Our company was built in 2009 with an ISO certificate.In the past 6 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so on.O

112849-27-1 Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Kilogram

FOB Price: $1000.0

Type:Lab/Research institutions

inquiry

Zibo Dorne chemical technology co. LTD

Product Details Grade: pharmaceutical grade Purity:99%+ ProductionCapacity: 1000 Kilogram/Month Scope of use: For scientific research only(The product must be used legally) Our Advantage 1. Best quality with competitive price. 2. Quick shipping,

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

EAST CHEMSOURCES LIMITED

factory?direct?saleAppearance:White Powder Storage:Store In Dry, Cool And Ventilated Place Package:25kg/drum, also according to the clients requirement Application:It is widely used as a thickener, emulsifier and stabilizer Transportation:By Sea Or B

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Kilogram

FOB Price: $18.0 / 20.0

Type:Trading Company

inquiry

Shandong Mopai Biotechnology Co., LTD

Shandong Mopai Biotechnology Co., LTD is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemicals. W

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

KAISA GROUP INC

1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Metric Ton

FOB Price: $1.5

Type:Trading Company

inquiry

Hunan chemfish Pharmaceutical co.,Ltd

Appearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Bluecrystal chem-union

We are a Union of chemistry in China, consists of chemists,engineers, laboratories,factories in China. We organize surplus capacity of R&D and production as well as custom synthesis for chemical products and chemical business project. We are supp

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:1 Metric Ton

FOB Price: $1.0

Type:Trading Company

inquiry

GIHI CHEMICALS CO.,LIMITED

Lower price, sample is available,SDS test documents are available,large stock in warehouseAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:Fine chemical intermediates, used as the main raw material for the synthe

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Kono Chem Co.,Ltd

high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:0

Negotiable

Type:Other

inquiry

Aecochem Corp.

Our clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS

Bis-Tbdms-Trans-Calcipotriol

Cas:112849-27-1

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Hubei Taiho Chemical Co.,LTD

TAIHO Unique Advantages:1.We're factory2.Free samples available3.Commodity inspection can be done4.ISO9001,Kosher certifications5.10 years experiences Storage:Store in cool &dry place Package:aluminium foil bag/fiber can/plastic drum Application:comp

Bis-TBDMS-trans-calcipotriol

Cas:112849-27-1

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Synthetic route

1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3’-cyclopropyl-3’-oxypropyl-1’(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-17-9

1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3’-cyclopropyl-3’-oxypropyl-1’(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

A

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With sodium tetrahydroborate; cerium(III) chloride In methanol further reag.: (S)-BINAL-H;A 55%
B 33%
Stage #1: 1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3’-cyclopropyl-3’-oxypropyl-1’(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene With borane N,N-diethylaniline complex; (3aR)-1-methyl-3,3-diphenyl-tetrahydro-pyrrolo[1,2-c][1,3,2]oxazaborole In tetrahydrofuran; toluene at 0 - 5℃; for 2.66667 - 3.58333h;
Stage #2: With water; sodium hydrogencarbonate In tetrahydrofuran; toluene at 0 - 5℃;
(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With sulfuric acid In tetrahydrofuran; water at 20℃; pH=1.7;45%
With sodium hydrogen sulfate In tetrahydrofuran; water; acetone at 20 - 25℃; for 3.66667h; pH=1.58;
With sulfuric acid In water; ethyl acetate; acetone at 27℃; for 0.583333h; pH=1.25;
With phosphoric acid In tetrahydrofuran; water; acetone at 20℃; for 19h; pH=1.48;
With phosphoric acid In tetrahydrofuran; water; acetone at 30℃; for 6h; pH=1.01;
Cyclopropyl methyl ketone
765-43-5

Cyclopropyl methyl ketone

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1: 87 percent / bromine / methanol / 0.5 h / Ambient temperature
2: 84 percent
3: 86 percent / 2N sodium hydroxide / H2O; CH2Cl2
5: N-methylmorpholine N-oxide, selenium dioxide
6: imidazole / dimethylformamide
7: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
Multi-step reaction with 5 steps
1: 87 percent / bromine / methanol / 0.5 h / Ambient temperature
2: 84 percent
3: 86 percent / 2N sodium hydroxide / H2O; CH2Cl2
4: dimethylsulfoxide / 4 h / 105 °C
5: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
2-bromo-1-cyclopropylethan-1-one
69267-75-0

2-bromo-1-cyclopropylethan-1-one

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: 84 percent
2: 86 percent / 2N sodium hydroxide / H2O; CH2Cl2
4: N-methylmorpholine N-oxide, selenium dioxide
5: imidazole / dimethylformamide
6: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
Multi-step reaction with 4 steps
1: 84 percent
2: 86 percent / 2N sodium hydroxide / H2O; CH2Cl2
3: dimethylsulfoxide / 4 h / 105 °C
4: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
1-cyclopropyl-2-(triphenyl-λ5-phosphanylidene)ethan-1-one
7691-76-1

1-cyclopropyl-2-(triphenyl-λ5-phosphanylidene)ethan-1-one

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 4 steps
2: N-methylmorpholine N-oxide, selenium dioxide
3: imidazole / dimethylformamide
4: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
Multi-step reaction with 2 steps
1: dimethylsulfoxide / 4 h / 105 °C
2: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
tert-butyldimethylsilyl chloride
18162-48-6

tert-butyldimethylsilyl chloride

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1: 42 percent / imidazole / dimethylformamide / 1.5 h / 20 °C
2: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
3: NaHCO3 / aq. ethanol / Heating
5: N-methylmorpholine N-oxide, selenium dioxide
6: imidazole / dimethylformamide
7: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
Multi-step reaction with 7 steps
1: 52 percent / imidazole / dimethylformamide / 1.5 h / 20 °C
2: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
3: NaHCO3 / aq. ethanol / Heating
5: N-methylmorpholine N-oxide, selenium dioxide
6: imidazole / dimethylformamide
7: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
3(R)-(tert-butyldimethylsilyloxy)-20(S)-formyl-9,10-secopregna-5(Z),7(E),10(19)-triene
112828-12-3

3(R)-(tert-butyldimethylsilyloxy)-20(S)-formyl-9,10-secopregna-5(Z),7(E),10(19)-triene

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 4 steps
2: N-methylmorpholine N-oxide, selenium dioxide
3: imidazole / dimethylformamide
4: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
(S)-3-[(1R,3aS,7aR)-7a-Methyl-1-((E)-(1R,4R)-1,4,5-trimethyl-hex-2-enyl)-octahydro-inden-(4E)-ylidenemethyl]-2,2-dioxo-2,3,4,5,6,7-hexahydro-1H-2λ6-benzo[c]thiophen-5-ol
87680-65-7

(S)-3-[(1R,3aS,7aR)-7a-Methyl-1-((E)-(1R,4R)-1,4,5-trimethyl-hex-2-enyl)-octahydro-inden-(4E)-ylidenemethyl]-2,2-dioxo-2,3,4,5,6,7-hexahydro-1H-2λ6-benzo[c]thiophen-5-ol

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1: 42 percent / imidazole / dimethylformamide / 1.5 h / 20 °C
2: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
3: NaHCO3 / aq. ethanol / Heating
5: N-methylmorpholine N-oxide, selenium dioxide
6: imidazole / dimethylformamide
7: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
Multi-step reaction with 7 steps
1: 52 percent / imidazole / dimethylformamide / 1.5 h / 20 °C
2: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
3: NaHCO3 / aq. ethanol / Heating
5: N-methylmorpholine N-oxide, selenium dioxide
6: imidazole / dimethylformamide
7: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
20(R),3(R)-(tert-butyldimethylsilyloxy)-20-(3'-cyclopropyl-3'-oxoprop-1'(E)-enyl)-9,10-secopregna-5(Z),7(E),10(19)-triene
112849-18-0

20(R),3(R)-(tert-butyldimethylsilyloxy)-20-(3'-cyclopropyl-3'-oxoprop-1'(E)-enyl)-9,10-secopregna-5(Z),7(E),10(19)-triene

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: N-methylmorpholine N-oxide, selenium dioxide
2: imidazole / dimethylformamide
3: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
(E)-(R)-4-{(1R,3aS,7aR)-4-[2-[(R)-5-(tert-Butyl-dimethyl-silanyloxy)-3-hydroxy-2-methylene-cyclohex-(E)-ylidene]-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-1-cyclopropyl-pent-2-en-1-one

(E)-(R)-4-{(1R,3aS,7aR)-4-[2-[(R)-5-(tert-Butyl-dimethyl-silanyloxy)-3-hydroxy-2-methylene-cyclohex-(E)-ylidene]-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-1-cyclopropyl-pent-2-en-1-one

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: imidazole / dimethylformamide
2: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
(2-cyclopropyl-2-oxoethyl) (triphenyl)phosphonium bromide
112849-15-7

(2-cyclopropyl-2-oxoethyl) (triphenyl)phosphonium bromide

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: 86 percent / 2N sodium hydroxide / H2O; CH2Cl2
3: N-methylmorpholine N-oxide, selenium dioxide
4: imidazole / dimethylformamide
5: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
Multi-step reaction with 3 steps
1: 86 percent / 2N sodium hydroxide / H2O; CH2Cl2
2: dimethylsulfoxide / 4 h / 105 °C
3: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
(7Z)-Vitamin D2
247900-07-8

(7Z)-Vitamin D2

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 8 steps
1: liq. SO2 / 0.5 h / Heating
2: 42 percent / imidazole / dimethylformamide / 1.5 h / 20 °C
3: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
4: NaHCO3 / aq. ethanol / Heating
6: N-methylmorpholine N-oxide, selenium dioxide
7: imidazole / dimethylformamide
8: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
Multi-step reaction with 8 steps
1: liq. SO2 / 0.5 h / Heating
2: 52 percent / imidazole / dimethylformamide / 1.5 h / 20 °C
3: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
4: NaHCO3 / aq. ethanol / Heating
6: N-methylmorpholine N-oxide, selenium dioxide
7: imidazole / dimethylformamide
8: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
3(S)-tert-butyldimethylsilyloxy-20(S)-formyl-9,10-secoprega-5,7(E),10(19)-triene
87407-47-4

3(S)-tert-butyldimethylsilyloxy-20(S)-formyl-9,10-secoprega-5,7(E),10(19)-triene

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: NaHCO3 / aq. ethanol / Heating
3: N-methylmorpholine N-oxide, selenium dioxide
4: imidazole / dimethylformamide
5: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
3(S)-tert-butyldimethylsilyloxy-20(S)-formyl-9,10-secoprega-5,7(E),10(19)-triene
87422-13-7

3(S)-tert-butyldimethylsilyloxy-20(S)-formyl-9,10-secoprega-5,7(E),10(19)-triene

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: NaHCO3 / aq. ethanol / Heating
3: N-methylmorpholine N-oxide, selenium dioxide
4: imidazole / dimethylformamide
5: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
(3S,6R)-(tert-butyldimethylsilyloxy)-9,10-seco-ergosta-5,7(E),10(19),22(E)-tetraene SO2 adduct
87417-26-3

(3S,6R)-(tert-butyldimethylsilyloxy)-9,10-seco-ergosta-5,7(E),10(19),22(E)-tetraene SO2 adduct

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
2: NaHCO3 / aq. ethanol / Heating
4: N-methylmorpholine N-oxide, selenium dioxide
5: imidazole / dimethylformamide
6: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
(3S,6S)-(tert-butyldimethylsilyloxy)-9,10-seco-ergosta-5,7(E),10(19),22(E)-tetraene SO2-adduct
87417-26-3, 87417-27-4

(3S,6S)-(tert-butyldimethylsilyloxy)-9,10-seco-ergosta-5,7(E),10(19),22(E)-tetraene SO2-adduct

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: 1.) ozone 2.) PPh3 / 1.) CH2Cl2, MeOH, -60 deg C 2.) CH2Cl2, MeOH, -60 to 0 deg C
2: NaHCO3 / aq. ethanol / Heating
4: N-methylmorpholine N-oxide, selenium dioxide
5: imidazole / dimethylformamide
6: 33 percent / NaBH4, CeCl3*6H2O / methanol / further reag.: (S)-BINAL-H
View Scheme
C42H72O4Si2

C42H72O4Si2

A

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Stage #1: C42H72O4Si2 With silica gel In hexane; ethyl acetate at 20℃; Reaction on a column;
Stage #2: With potassium carbonate In tetrahydrofuran; methanol Product distribution / selectivity;
A n/a
B n/a
C46H71NO6Si2

C46H71NO6Si2

A

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With silica gel In hexane; ethyl acetate Product distribution / selectivity; Mitsunobu reaction;
C41H70O4Si2

C41H70O4Si2

A

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With silica gel In hexane at 0 - 40℃; for 2.5 - 26h; Product distribution / selectivity;A n/a
B n/a
With silica gel; potassium carbonate In hexane for 48h; Product distribution / selectivity;
With silica gel; triethylamine In hexane for 7h; Product distribution / selectivity;
1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-oxoprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene SO2-adducts

1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-oxoprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene SO2-adducts

A

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
Stage #1: 1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-oxoprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene SO2-adducts With borane Ν,Ν-diethylaniline complex; (1S,2R)-1-amino-2-indanol In tert-butyl methyl ether; toluene at 10 - 25℃; for 0.5 - 1h;
Stage #2: With hydrogenchloride In tert-butyl methyl ether; water; toluene at 10 - 15℃;
Stage #3: With sodium hydrogencarbonate In water at 90℃; for 2 - 2.5h; Product distribution / selectivity;
Stage #1: 1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-oxoprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene SO2-adducts With dimethylsulfide borane complex; (1S,2R)-1-amino-2-indanol In tert-butyl methyl ether; toluene at 15 - 20℃; for 0.5 - 1h;
Stage #2: With hydrogenchloride In tert-butyl methyl ether; water; toluene at 10 - 15℃;
Stage #3: With sodium hydrogencarbonate In water at 90℃; for 2 - 2.5h; Product distribution / selectivity;
Stage #1: 1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-oxoprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene SO2-adducts With borane Ν,Ν-diethylaniline complex; (R)-α,α-diphenylprolinol In tert-butyl methyl ether; toluene at 15 - 20℃; for 0.5 - 1h;
Stage #2: With hydrogenchloride In tert-butyl methyl ether; water; toluene at 10 - 15℃;
Stage #3: With sodium hydrogencarbonate In water at 90℃; for 2 - 2.5h; Product distribution / selectivity;
SO2-adduct of 1(S),3(R)-bis(tert-butyl-dimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'(S)-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

SO2-adduct of 1(S),3(R)-bis(tert-butyl-dimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'(S)-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

SO2-adduct of 1(S),3(R)-bis(tert-butyl-dimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'(R)-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
878285-87-1

SO2-adduct of 1(S),3(R)-bis(tert-butyl-dimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'(R)-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

A

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With sodium hydrogencarbonate In water at 90℃; for 2 - 2.5h; Retro Diels-Alder Reaction;
C39H70O5SSi2

C39H70O5SSi2

C39H70O5SSi2

C39H70O5SSi2

C39H70O5SSi2

C39H70O5SSi2

C39H70O5SSi2

C39H70O5SSi2

A

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With sodium hydrogencarbonate In tert-butyl methyl ether; water; toluene at 90℃; for 2 - 2.5h; retro Diels-Alder Reaction;
(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

(1S,3R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'(S)-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(Z),7(E),10(19)-triene
112875-61-3

(1S,3R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'(S)-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(Z),7(E),10(19)-triene

Conditions
ConditionsYield
With anthracene; triethylamine In toluene at 20℃; for 1h; Irradiation;
With 9-acetylanthracene; triethylamine In toluene at 5 - 8℃; for 0.75h; UV-irradiation;
With 9-acetylanthracene In toluene at 20℃; UV-irradiation;
9-acetylanthracene In tert-butyl methyl ether at 10℃; Industry scale; Irradiation;
With anthracene; triethylamine In toluene at 20 - 25℃; UV-irradiation;
(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

(1S,3R,1'S,2'S,3'S)-(3'-cyclopropyl-1',2'-epoxy-3'-hydroxypropyl)-9,10-secopregna-5(E),7(E),10(19)-triene
115540-29-9, 115540-30-2, 115540-31-3, 115598-01-1

(1S,3R,1'S,2'S,3'S)-(3'-cyclopropyl-1',2'-epoxy-3'-hydroxypropyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With titanium(IV) isopropylate; tert.-butylhydroperoxide; (+)-Weinsaeure-diethylester In dichloromethane at -20℃; further reag.: (-)-diethyl tartrate; Yield given;
(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

A

(1S,3R,1'S,2'S,3'S)-(3'-cyclopropyl-1',2'-epoxy-3'-hydroxypropyl)-9,10-secopregna-5(E),7(E),10(19)-triene
115540-29-9, 115540-30-2, 115540-31-3, 115598-01-1

(1S,3R,1'S,2'S,3'S)-(3'-cyclopropyl-1',2'-epoxy-3'-hydroxypropyl)-9,10-secopregna-5(E),7(E),10(19)-triene

B

(1S,3R,1'R,2'R,3'S)-(3'-cyclopropyl-1',2'-epoxy-3'-hydroxypropyl)-9,10-secopregna-5(E),7(E),10(19)-triene
115540-29-9, 115540-30-2, 115540-31-3, 115598-01-1

(1S,3R,1'R,2'R,3'S)-(3'-cyclopropyl-1',2'-epoxy-3'-hydroxypropyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With titanium(IV) isopropylate; tert.-butylhydroperoxide; (-)-diethyl tartrate In dichloromethane at -20℃; further reag.: (+)-diethyl tartrate; Yield given. Yields of byproduct given;
(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

calcipotriene
112965-21-6

calcipotriene

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: anthracene, triethylamine / toluene / 1 h / 20 °C / Irradiation
2: 73 percent / tetrabutylammonium fluoride / tetrahydrofuran / 0.83 h / 60 °C
View Scheme
vinyl acetate
108-05-4

vinyl acetate

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

C41H70O4Si2

C41H70O4Si2

Conditions
ConditionsYield
Alcaligenes sp. lipase In hexane at 22 - 28℃; for 3h; Enzymatic reaction;n/a
Alcaligenes sp. lipase In di-isopropyl ether at 20℃; for 2h; Enzymatic reaction;n/a
(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

4-nitro-benzoic acid
62-23-7

4-nitro-benzoic acid

C46H71NO6Si2

C46H71NO6Si2

Conditions
ConditionsYield
With di-isopropyl azodicarboxylate; triphenylphosphine In tetrahydrofuran at 60℃; for 4.5h; Mitsunobu reaction;n/a
C41H70O4Si2
565429-98-3

C41H70O4Si2

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-26-0

(1S,3R,3'R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

Conditions
ConditionsYield
With silica gel In hexane for 1.5h; Product distribution / selectivity;
(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene
112849-27-1

(1S,3R,3'S)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(E),7(E),10(19)-triene

A

C39H68O3Si2

C39H68O3Si2

B

(1S,3R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'(S)-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(Z),7(E),10(19)-triene
112875-61-3

(1S,3R)-bis(tert-butyldimethylsilyloxy)-20(R)-(3'(S)-cyclopropyl-3'-hydroxyprop-1'(E)-enyl)-9,10-secopregna-5(Z),7(E),10(19)-triene

Conditions
ConditionsYield
9-acetylanthracene In tert-butyl methyl ether at 10℃; Product distribution / selectivity; UV-irradiation;
9-acetylanthracene In tert-butyl methyl ether at 10℃; Product distribution / selectivity; UV-irradiation;

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