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inquiry1.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
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inquiryPhosphine oxide, [(2Z)-2-[(3R,4R,5R)-3,5-bis[[(1,1-diMethylethyl)diMethylsilyl]oxy]-4-[3-[[(1,1-diMethylethyl)diMethylsilyl]oxy]propoxy]-2-Methylenecyclohexylidene]ethyl]diphenyl- CAS: 200636-54-0 Qingdao Belugas Import and Export Co., Ltd. is a sci
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inquiryOur company provides one-stop services of research - development - production for a variety of special prouducts. Not only do we make effective use of our strong technological strength, but also establish of cooperative relations with several well-
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inquiryHangzhou 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
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inquiryZibo 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
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inquiryProduct 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,
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inquiryfactory?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
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inquiryShandong 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
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inquiryWe have established ourselves as a renowned manufacturer, exporter and supplier of Eldecalcitol Intermediates A (cas no.:200636-54-0). Our skilled professionals formulate these compounds by making use of various ingredients and chemicals availabl
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inquiryWe 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
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inquiryWe product this chemical more than 10 years . We are very experience to export it to many countries, Our superior & stable quality , competitive price gain warm reception from our customers. Application:Pharm intermediate
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inquiryfactory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
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inquiryProduct name: ((Z)-((3S,4S,5R)-5-((tert-butyldimethylsilyl)oxy)-4-(4-((tert-butyldimethylsilyl)oxy)butyl)-3-methyl-2-methylenecyclohexylidene)methyl)diphenylphosphine oxide Cas No: 200636-54-0 Assay: 99%min
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inquiryTaizhou Tyloo Biopharm Co.,Ltd is located in Taizhou City which is famous as API production base in China. We are a medical high-tech enterprises, mainly engaged in anti-cancer inhibitor、complex molecules and new drug research,development and sales
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inquirySuperiority: 1. Quality: High purity, strict quality control, 10 years experience in chemical industry. 2. Price: Moderate price, more QTY more discount. 3. MOQ: Sample order is welcome to test quality. 4. Shipping time: In Stock, can be sh
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inquiryWe are a trading company aiming at providing high-quality services to customers. Established for many years, with good reputation in the industry Storage:Sealed and preserved Application:Fine chemical intermediates, used as the main raw material for
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inquiryR & D enterprises have their own stock in stockAppearance:To be subject to the object Package:Customized Application:pharmaceutical intermediates Transportation:Air Port:Shanghai;Guangzhou
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inquiry[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
With dihydrogen peroxide | |
With dihydrogen peroxide In chloroform for 0.0166667h; | 86 mg |
With dihydrogen peroxide In tetrahydrofuran; chloroform; water at 20℃; for 0.5h; | 33.8 mg |
((Z)-2-((3R,4R,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)-4-(3-((tert-butyldiphenylsilyl)oxy)propoxy)-2-methylenecyclohexylidene)ethyl)diphenylphosphine oxide
t-butyldimethylsiyl triflate
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Stage #1: (Z)-[2-{(3R,4R,5R)-3,5-bis(tert-butyldimethylsilanyloxy)-2-methylene-4-(3-(tert-butyldiphenylsilanyloxy)propoxy)cyclohexylidene}ethyl]diphenylphosphine oxide With tetrabutyl ammonium fluoride In tetrahydrofuran Inert atmosphere; Stage #2: t-butyldimethylsiyl triflate With N-ethyl-N,N-diisopropylamine In dichloromethane Inert atmosphere; | 70% |
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
With dihydrogen peroxide | |
With dihydrogen peroxide In chloroform for 0.0166667h; | 86 mg |
With dihydrogen peroxide In tetrahydrofuran; chloroform; water at 20℃; for 0.5h; | 33.8 mg |
[3R-(1Z,3β,4α,5α)]-2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-(3-hydroxypropoxy)-2-methylenecyclohexylidene]ethanol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: 57 percent / NCS; Me2S / CH2Cl2 / 0.67 h 2: 92 percent / imidazole / dimethylformamide / 0.25 h / 20 °C 3: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 4: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme |
[3R-(1Z,3β,4α,5α)]-2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]-1-chloroethane
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 2: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme | |
Multi-step reaction with 2 steps 2: H2O2 View Scheme |
[3R-(1Z,3β,4α,5α)]-2-[5-(1,1-dimethylethyl)dimethylsilyloxy-3,4-isopropylidenedioxy-2-methylenecyclohexylidene]ethanol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 9 steps 1: 83 percent / pyridine; DMAP / CH2Cl2 / 1 h / 0 °C 2: 82 percent / CSA; (+)-10-camphorsulfonic acid / methanol / 3 h / 20 °C 3: 96 percent / imidazole / dimethylformamide / 3 h / 0 °C 4: 88 percent / Me4NOH; aq. NaOH / toluene / 72 h / 20 °C 5: 91 percent / LiAlH4 / tetrahydrofuran / 0.25 h / 0 °C 6: 57 percent / NCS; Me2S / CH2Cl2 / 0.67 h 7: 92 percent / imidazole / dimethylformamide / 0.25 h / 20 °C 8: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 9: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme |
[3R-(1Z,3β,4α,5α)]-2-[3,4,5-trihydroxy-2-methylenecyclohexylidene]ethyl trimethylacetate
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 7 steps 1: 96 percent / imidazole / dimethylformamide / 3 h / 0 °C 2: 88 percent / Me4NOH; aq. NaOH / toluene / 72 h / 20 °C 3: 91 percent / LiAlH4 / tetrahydrofuran / 0.25 h / 0 °C 4: 57 percent / NCS; Me2S / CH2Cl2 / 0.67 h 5: 92 percent / imidazole / dimethylformamide / 0.25 h / 20 °C 6: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 7: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme |
[3R-(1Z,3β,4α,5α)]-2-[5-(1,1-dimethylethyl)dimethylsilyloxy-3,4-isopropylidenedioxy-2-methylenecyclohexylidene]ethyl trimethylacetate
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 8 steps 1: 82 percent / CSA; (+)-10-camphorsulfonic acid / methanol / 3 h / 20 °C 2: 96 percent / imidazole / dimethylformamide / 3 h / 0 °C 3: 88 percent / Me4NOH; aq. NaOH / toluene / 72 h / 20 °C 4: 91 percent / LiAlH4 / tetrahydrofuran / 0.25 h / 0 °C 5: 57 percent / NCS; Me2S / CH2Cl2 / 0.67 h 6: 92 percent / imidazole / dimethylformamide / 0.25 h / 20 °C 7: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 8: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme |
[3R-(1Z,3β,4α,5α)]-2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-hydroxy-2-methylenecyclohexylidene]ethyl trimethylacetate
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1: 88 percent / Me4NOH; aq. NaOH / toluene / 72 h / 20 °C 2: 91 percent / LiAlH4 / tetrahydrofuran / 0.25 h / 0 °C 3: 57 percent / NCS; Me2S / CH2Cl2 / 0.67 h 4: 92 percent / imidazole / dimethylformamide / 0.25 h / 20 °C 5: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 6: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme |
[3R-(1Z,3β,4α,5α)]-2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-(3-hydroxypropoxy)-2-methylenecyclohexylidene]-1-chloroethane
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 92 percent / imidazole / dimethylformamide / 0.25 h / 20 °C 2: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 3: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme |
[3R-(1Z,3β,4α,5α)]-2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[2-(ethoxycarbonyl)ethoxy]-2-methylenecyclohexylidene]ethyl trimethylacetate
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 91 percent / LiAlH4 / tetrahydrofuran / 0.25 h / 0 °C 2: 57 percent / NCS; Me2S / CH2Cl2 / 0.67 h 3: 92 percent / imidazole / dimethylformamide / 0.25 h / 20 °C 4: n-BuLi / hexane; tetrahydrofuran / 0.33 h / -50 °C 5: 86 mg / aq. H2O2 / CHCl3 / 0.02 h View Scheme |
tert-butyldimethylsilyl chloride
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 7 steps 2: DDQ 3: 1.) Red-Al, 2.) I2 4: Pd(PPh3)4, Et3N 5: NCS, Me2SO / CH2Cl2 7: H2O2 View Scheme |
lithium diphenylphosphide
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 2: H2O2 View Scheme |
(2R,3S,4RS)-4-pivaloyloxy-3-(3-pivaloyloxypropoxy)-5-hexene-1,2-diol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 10 steps 1: PPh3, DEAd 2: 65 percent 3: NaOH / H2O 5: DDQ 6: 1.) Red-Al, 2.) I2 7: Pd(PPh3)4, Et3N 8: NCS, Me2SO / CH2Cl2 10: H2O2 View Scheme |
(3RS,4R,5R)-4-(3-hydroxypropoxy)-9-(p-methoxyphenylmethoxy)non-1-en-7-yne-3,5-diol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 7 steps 2: DDQ 3: 1.) Red-Al, 2.) I2 4: Pd(PPh3)4, Et3N 5: NCS, Me2SO / CH2Cl2 7: H2O2 View Scheme |
(2R,3S,4RS)-1,2-epoxy-4-pivaloyloxy-3-(3-pivaloyloxypropoxy)-5-hexene
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 9 steps 1: 65 percent 2: NaOH / H2O 4: DDQ 5: 1.) Red-Al, 2.) I2 6: Pd(PPh3)4, Et3N 7: NCS, Me2SO / CH2Cl2 9: H2O2 View Scheme |
(2R,3S,4RS)-1,2-O-isopropylidene-4-pivaloyloxy-3-(3-pivaloyloxypropoxy)-5-hexene-1,2-diol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 11 steps 1: aq. HCl 2: PPh3, DEAd 3: 65 percent 4: NaOH / H2O 6: DDQ 7: 1.) Red-Al, 2.) I2 8: Pd(PPh3)4, Et3N 9: NCS, Me2SO / CH2Cl2 11: H2O2 View Scheme |
(5R,6R,7RS)-5,7-bis(tert-butyldimethylsilyloxy)-6-(3-tert-butyldimethylsilyloxypropoxy)non-8-en-2-yn-1-ol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 1.) Red-Al, 2.) I2 2: Pd(PPh3)4, Et3N 3: NCS, Me2SO / CH2Cl2 5: H2O2 View Scheme |
(Z,5R,6R,7RS)-5,7-bis(tert-butyldimethylsilyloxy)-6-(3-tert-butyldimethylsilyloxypropoxy)-3-iodonona-2,8-dien-1-ol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: Pd(PPh3)4, Et3N 2: NCS, Me2SO / CH2Cl2 4: H2O2 View Scheme |
2,2-Dimethyl-propionic acid (2R,3R)-2-[3-(2,2-dimethyl-propionyloxy)-propoxy]-3-hydroxy-7-(4-methoxy-benzyloxy)-1-vinyl-hept-5-ynyl ester
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 8 steps 1: NaOH / H2O 3: DDQ 4: 1.) Red-Al, 2.) I2 5: Pd(PPh3)4, Et3N 6: NCS, Me2SO / CH2Cl2 8: H2O2 View Scheme |
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1: DDQ 2: 1.) Red-Al, 2.) I2 3: Pd(PPh3)4, Et3N 4: NCS, Me2SO / CH2Cl2 6: H2O2 View Scheme |
2,2-Dimethyl-propionic acid 3-[(S)-1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2-hydroxy-but-3-enyloxy]-propyl ester
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 12 steps 1: Et3N 2: aq. HCl 3: PPh3, DEAd 4: 65 percent 5: NaOH / H2O 7: DDQ 8: 1.) Red-Al, 2.) I2 9: Pd(PPh3)4, Et3N 10: NCS, Me2SO / CH2Cl2 12: H2O2 View Scheme |
(Z)-2-[(3R,4R,5R)-3,5-bis(tert-butyldimethylsilyloxy)-4-(3-tert-butyldimethylsilyloxypropoxy)-2-methylenecyclohexylidene]ethanol
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: NCS, Me2SO / CH2Cl2 3: H2O2 View Scheme |
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
(S)-2-[(1R,3aR,7aR)-octahydro-7a-methyl-4-oxo-4H-inden-1-yl]propyl 4-methylbenzenesulfonate
(1α,2β,3β,5Z,7E,20S)-1,3-bis[(1,1-dimethylethyl)dimethyl-silyloxy]-2-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-9,10-secopregna-5,7,10(19)-triene-20-methyl 4-methylbenzenesulfonate
Conditions | Yield |
---|---|
With n-butyllithium In tetrahydrofuran; toluene at -50℃; for 0.5h; | 66% |
25-[(triethylsilyl)oxy]de-A,B-cholestan-8-one
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
(5Z,7E)-(1R,2R,3R)-1,3-bis(tert-butyldimethylsilyloxy)-2-(3-tert-butyldimethylsilyloxypropoxy)-25-triethylsilyloxy-9,10-secocholesta-5,7,10(19)-triene
Conditions | Yield |
---|---|
Stage #1: [3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide With n-butyllithium In tetrahydrofuran; hexane at -78℃; for 0.333333h; Lythgoe coupling; Stage #2: 25-[(triethylsilyl)oxy]de-A,B-cholestan-8-one In tetrahydrofuran; hexane at -78℃; for 4h; Further stages.; | 15% |
25-[(triethylsilyl)oxy]de-A,B-cholestan-8-one
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Eldecalcitol
Conditions | Yield |
---|---|
Multistep reaction; |
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
(1β,2α,3α,5Z,7E)-1,3-bis[(1,1-dimethylethyl)dimethylsilyloxy]-2-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-25-trimethylsilyloxy-9,10-secocholesta-5,7,10(19)-triene
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: 66 percent / n-butyllithium / tetrahydrofuran; toluene / 0.5 h / -50 °C 2.1: Mg / tetrahydrofuran / 0.5 h / 20 °C 2.2: 89 percent / CuBr*Me2S / tetrahydrofuran / 0.5 h / -10 °C View Scheme |
[3R-(1Z,3β,4α,5α)]-[2-[3,5-bis[(1,1-dimethylethyl)dimethylsilyloxy]-4-[3-[(1,1-dimethylethyl)dimethylsilyloxy]propoxy]-2-methylenecyclohexylidene]ethyl]diphenylphosphine oxide
Eldecalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1.1: 66 percent / n-butyllithium / tetrahydrofuran; toluene / 0.5 h / -50 °C 2.1: Mg / tetrahydrofuran / 0.5 h / 20 °C 2.2: 89 percent / CuBr*Me2S / tetrahydrofuran / 0.5 h / -10 °C 3.1: 96 percent / HF/pyridine / tetrahydrofuran / 20 °C View Scheme |
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