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Xi'an Quanao Biotech Co., Ltd.

Company profile Xi’an Quanao Biotech Co., Ltd. with 10 years experience in plant extract filed. Focus on the research, production and sale of Plant and Animal extract, Medical intermediate, complete coverage six industries. Product grade: Med

Factory Supply Antiviral Raw Material White Birch Bark Extract 98% Betulin Powder

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $468.0 / 498.0

Type:Manufacturers

inquiry

Dayang Chem (Hangzhou) Co.,Ltd.

DayangChem exported this product to many countries and regions at best price. If you are looking for the material's manufacturer or supplier in China, DayangChem is your best choice. Pls contact with us freely for getting detailed product spe

Betulin Manufacturer/High quality/Best price/In stock

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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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 Betulinic Acid supplier in China

Cas:473-98-3

Min.Order:1 Metric Ton

Negotiable

Type:Manufacturers

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Kono Chem Co.,Ltd

Superiority pioneerbiotech is a leading manufacturer and supplier of chemicals in China. We develop ,produce and distribute high quality pharmaceuticals, intermediates, special chemicals and other fine chemicals. We could give you: 1.Best q

Betulin

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $800.0 / 1000.0

Type:Other

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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 Betulinic Acid

Cas:473-98-3

Min.Order:1

Negotiable

Type:Other

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Xi'an Xszo Chem Co., Ltd.

1. Factory price and high quality must be guaranteed, base on 8 years of production and R&D experience2. Free samples will be provided,ensure specifications and quality are right for customer3. Customers will receive the most professional technical s

High Content Natural Extract Betulin HACCP manufacturer

Cas:473-98-3

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

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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 Betulin

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Manufacturers

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COLORCOM LTD.

Colorcom is a global leader in industrial chemical manufacturing and is continuously innovating and transforming to exceed client expectations and industry standards. Colorcom prides itself on superior customer and technical focus, while focusing on

Betulin

Cas:473-98-3

Min.Order:1 Metric Ton

Negotiable

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

Betulin

Cas:473-98-3

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

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Hebei yanxi chemical co.,LTD.

CHENGDU YANXI is a comprehensive manufacturer and an international distribution of products throughout the world. Specialized in Scrap metal, Chemical raw materials, Paper products and color industry. We aim to become leading position in global dis

Premium natural ingredients of Birch extract Betulin,Betulinic acid Cas No.:473-98-3

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Trading Company

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Henan Tianfu Chemical Co., Ltd.

Ferrous fumarate Basic information Product Name: Ferrous fumarate Synonyms: IRON(II) FUMARATE;IRON(+2)FUMARATE;IRON FUMARATE;FERROUS FUMARATE;FERROUS FUMERATE;2-But

TIANFU-CHEM Ferrous fumarate14-10-1

Cas:473-98-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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

betula camphor 471-53-4 Betulin

Cas:473-98-3

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

Manufacturer supply CAS 473-98-3 with best quality

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Hebei Sankai Chemical Technology Co., Ltd

1. Product advantages ♦ High purity, all above 98.5%, no impurities after dissolution ♦ We will test each batch to ensure quality ♦ OEM and private brand services designed for free ♦ Various cap colors available ♦ W

Betulin CAS473-98-3

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $289.0 / 499.0

Type:Trading Company

inquiry

Henan Sinotech Import&Export Corporation

Product Name: Betulin Part used:Bark specification: 70% 90% 95% 98% CAS No: 473-98-3 Molecular formula: C30H50O2 Molecular weight: 442.7 Appearance: white powder Storage:Store in cool and dry place, away from sun light. Pa

Betulin CAS: 473-98-3

Cas:473-98-3

Min.Order:5 Metric Ton

FOB Price: $1.0 / 2.0

Type:Other

inquiry

Hangzhou Sartort Biopharma Co., Ltd

Appearance:White powder Storage:Room temperature Package:1kg/bag Application:Used in food, cosmetics and medicine industries Transportation:Express/Sea/Air Port:Any port in china

High Quality Betulin birch bark extract Betulin

Cas:473-98-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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

Lup-20(29)-ene-3,28-diol,(3b)- 473-98-3

Cas:473-98-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Xi'an Faithful Biotech Co., Ltd.

We are the manufacturers and suppliers of API in China, and warehouse in Germany and USA of California, which can quickly and safely deliver to your address 1.High quality and competitive price. 2.Free sample for your evaluation. 3.Promptly delivery

Hangzhou Fonlynn Health Technology Co., Ltd.

Packing: According to customer requirements Delivery time: In stock or depands Port of shipment: Ningbo/Shanghai/Qingdao OEM/ODM:Welcome Sample:We can offer our existing samples at once Appearance:white powder/ Refer to COA Storage:Refer to COA

Betulin 473-98-3 cas powder Extract Pure Birch Bark Extract 99%

Cas:473-98-3

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

inquiry

HANWAYS CHEMPHARM CO.,LIMITED

1.Prompt Goods; 2.Flexible payment terms; 3.Documents & Certificate support. Storage:Under Inert Atmosphere Package:25kg/drum Application:Application: Functional food, cosmetics and pharmaceutical industries. Trans

high purity Cosmetic Grade Betulin Supplement Betulin Extract CAS 473-98-3

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $170.0

Type:Trading Company

inquiry

Baoji Guokang Healthchem co.,ltd

Our company has been in existence for 10 years since its establishment. We have our own unique team. The company integrates independent research and development, production and sales. We have established famous brands at home and abroad. At present

supply high quality Organic Betulinic Acid 98% Birch Bark Extract Betulin cas 473-98-3

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $210.0 / 230.0

Type:Trading Company

inquiry

Qingdao Beluga Import and Export Co., LTD

Betulin CAS:473-98-3 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high quality organic intermediates, ster

Betulin CAS:473-98-3

Cas:473-98-3

Min.Order:1 Gram

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

Betulin

Cas:473-98-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Hubei Jiutian Bio-medical Technology Co., Ltd

1,we produce and sell good chemicals around the world. 2,our success rate is about 95%. this means, if customer order is accepted, the probability that the customer will obtain the ordered substances, is 95%. 3,our staff consists of highly qualifie

cas 473-98-3 Betulin

Cas:473-98-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Guangdong Juda Chemical Industrial Co.,Limited

1.Free sample(10-20g or enough to detection) and Unconditional assume respons 2.100% Natural porduct, without any synthetize ingredient 3.Manufacturer direct supply, provide OEM, R&D service 4.ISO/HACCP/KOSHER/GMP/FDA 5.Leading plant ex

CAS No.473-98-3 Betulin

Cas:473-98-3

Min.Order:1 Kilogram

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

Lup-20(29)-ene-3,28-diol,(3b)-

Cas:473-98-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

ShangHai Soyoung Biotechnology Inc

Shanghai SOYOUNG onsite assessment conducted by Bureau Veritas commissioned at June 2018. Assessed Supplier of Shanghai SOYOUNG is a faithful and professional supplier of health raw materials in pharmacy, food, cosmetic and other fields for many ye

Betulin 70%-98% Betula platyphylla extract

Cas:473-98-3

Min.Order:25 Kilogram

FOB Price: $230.0 / 350.0

Type:Lab/Research institutions

inquiry

Leader Biochemical Group

Betulin Basic information Extract Physical and Chemical Properties Extraction method Identification method Physiological functions Storage References

China Biggest Factory & Manufacturer supply Betulin 50MT/Year

Cas:473-98-3

Min.Order:1 Kilogram

FOB Price: $1.0 / 2.0

Type:Lab/Research institutions

inquiry

Chengdu Biopurify Phytochemicals Ltd.

Chengdu Biopurify Phytochemicals Ltd. is a leading company in the research, development, manufacture and marketing of High Quality Phytochemicals and Extracts(especially Active Ingredients from Traditional Chinese Medicine,Traditional Chinese Medic

Betulin

Cas:473-98-3

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

betulin

Cas:473-98-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

betulin diacetate
1721-69-3

betulin diacetate

betulin
473-98-3

betulin

Conditions
ConditionsYield
With potassium hydroxide In ethanol for 2h; Heating;96%
With potassium hydroxide; ethanol In toluene for 2h; Heating / reflux;93%
With sodium hydroxide In tetrahydrofuran; methanol at 20℃; for 168000h;
3,28-bis(O-THP)-betulin

3,28-bis(O-THP)-betulin

betulin
473-98-3

betulin

Conditions
ConditionsYield
With montmorillonite K-10 In methanol at 40 - 50℃; for 2h;95%
betulin 3,28-bis-O-trifluoroacetate

betulin 3,28-bis-O-trifluoroacetate

betulin
473-98-3

betulin

Conditions
ConditionsYield
With sodium hydroxide In ethanol; toluene at 60℃; for 3h;94%
Betulinic acid
472-15-1

Betulinic acid

A

betulin
473-98-3

betulin

B

betulinic aldehyde
13159-28-9, 92594-07-5

betulinic aldehyde

Conditions
ConditionsYield
With lithium aluminium tetrahydride In tetrahydrofuran for 4h; Heating;A 90%
B 5%
Betulinic acid
472-15-1

Betulinic acid

betulin
473-98-3

betulin

Conditions
ConditionsYield
With lithium aluminium tetrahydride In tetrahydrofuran for 5h; Reflux; Inert atmosphere; Sealed tube;90%
Multi-step reaction with 2 steps
1: 1 g / diethyl ether; CH2Cl2 / 0 °C
2: 0.65 g / LiAlH4 / tetrahydrofuran / 3 h / Heating
View Scheme
Multi-step reaction with 2 steps
2: LAH
View Scheme
betulin diacetate
1721-69-3

betulin diacetate

A

betulin
473-98-3

betulin

B

betulin monoacetate
27570-20-3

betulin monoacetate

Conditions
ConditionsYield
With calcium hydroxide In methanol; chloroform for 24h; Ambient temperature;A 10%
B 89%
With magnesium methanolate In tetrahydrofuran; methanol for 72h; Ambient temperature;A 14%
B 81%
With sodium methylate In tetrahydrofuran; methanol for 48h; Ambient temperature;A 53.1%
B 43.4%
methyl betulinate
2259-06-5, 25493-95-2

methyl betulinate

betulin
473-98-3

betulin

Conditions
ConditionsYield
With lithium aluminium tetrahydride In tetrahydrofuran at 10 - 20℃;76%
With lithium aluminium tetrahydride
With lithium aluminium tetrahydride In tetrahydrofuran; diethyl ether for 3h; Heating;
With lithium aluminium tetrahydride In tetrahydrofuran for 3h; Heating;0.65 g
betulinic aldehyde
13159-28-9, 92594-07-5

betulinic aldehyde

acrylic acid methyl ester
292638-85-8

acrylic acid methyl ester

A

(R)-4-[3β-hydroxy-28-norlup-20(29)-en-17β-yl]-γ-butyrolactone
1228273-12-8

(R)-4-[3β-hydroxy-28-norlup-20(29)-en-17β-yl]-γ-butyrolactone

B

betulin
473-98-3

betulin

Conditions
ConditionsYield
With samarium; 1,2-Diiodoethane; tert-butyl alcohol In tetrahydrofuran at 0℃; Inert atmosphere;A 47%
B n/a
betulonic aldehyde
4439-98-9

betulonic aldehyde

A

betulin
473-98-3

betulin

B

3-epi-betulinic aldehyde

3-epi-betulinic aldehyde

Conditions
ConditionsYield
With sodium hydroxide; dihydrogen peroxide; L-Selectride 1.) THF, -20 deg C, min, 2.) THF, 1 h; Yield given. Multistep reaction. Yields of byproduct given;
betulinic acid

betulinic acid

betulin
473-98-3

betulin

Conditions
ConditionsYield
With tetrahydrofuran; lithium aluminium tetrahydride; diethyl ether
methanol
67-56-1

methanol

betulin 3-O-palmitate

betulin 3-O-palmitate

A

hexadecanoic acid methyl ester
112-39-0

hexadecanoic acid methyl ester

B

betulin
473-98-3

betulin

Conditions
ConditionsYield
With potassium hydroxide for 3h; Heating;
3β-O-cis-feruloylbetulin
1256450-16-4

3β-O-cis-feruloylbetulin

betulin
473-98-3

betulin

Conditions
ConditionsYield
With potassium hydroxide In methanol at 65℃; for 10h;
28-acetoxybetulin
27686-35-7

28-acetoxybetulin

acrylonitrile
107-13-1

acrylonitrile

A

3-[3β-hydroxylup-20(29)-en-28-yloxy]propanenitrile
1239919-26-6

3-[3β-hydroxylup-20(29)-en-28-yloxy]propanenitrile

B

betulin
473-98-3

betulin

C

3β-(2-cyanoethoxy)lup-20(29)-en-28-yl acetate
1309960-59-5

3β-(2-cyanoethoxy)lup-20(29)-en-28-yl acetate

D

3β,28-di(2-cyanoethoxy)lup-20(29)-ene
1309960-47-1

3β,28-di(2-cyanoethoxy)lup-20(29)-ene

Conditions
ConditionsYield
With N-benzyl-N,N,N-triethylammonium chloride; potassium hydroxide In 1,4-dioxane; water at 20℃; for 24h; Inert atmosphere;A 5 %Chromat.
B 22 %Chromat.
C 64 %Chromat.
D 9 %Chromat.
3-O-myristoylbetulin

3-O-myristoylbetulin

betulin
473-98-3

betulin

Conditions
ConditionsYield
With methanol; potassium hydroxide for 2h;
3β-O-cis-caffeoylbetulin

3β-O-cis-caffeoylbetulin

betulin
473-98-3

betulin

Conditions
ConditionsYield
With potassium hydroxide at 20℃; for 12h;
betulin
473-98-3

betulin

lupane-3β,28-diol
55029-05-5, 7372-31-8

lupane-3β,28-diol

Conditions
ConditionsYield
With hydrogen; 10percent Pd/C In tetrahydrofuran; methanol under 2068.65 Torr;100%
With hydrogen; palladium 10% on activated carbon In methanol; dichloromethane under 1810.07 Torr; for 16h;100%
With hydrogen; platinum(IV) oxide In methanol; chloroform for 8h;99%
betulin
473-98-3

betulin

acetic anhydride
108-24-7

acetic anhydride

betulin diacetate
1721-69-3

betulin diacetate

Conditions
ConditionsYield
With pyridine; dmap at 20℃; for 1h;100%
With dmap In tetrahydrofuran at 20℃;100%
montmorillonite acid clay for 0.0333333h; microwave irradiation;99%
Conditions
ConditionsYield
Montmorillonite KSF In dichloromethane for 3.5h; Heating;99%
With trifluoroacetic acid In chloroform at 22℃; for 0.133333h;97%
With amberlyst 15 In chloroform Reflux;96%
betulin
473-98-3

betulin

19β,28-epoxy-A-neo-18α-olean-3(5)-ene
6714-21-2

19β,28-epoxy-A-neo-18α-olean-3(5)-ene

Conditions
ConditionsYield
With bithmuth(III) triflate hydrate In dichloromethane for 40h; Reflux;98%
With kieselguhr; xylene
Multi-step reaction with 2 steps
1: 99 percent / montmorillonite KSF / CH2Cl2 / 3.5 h / Heating
2: 65 percent / montmorillonite K10 / cyclohexane / 2.5 h / Heating
View Scheme
Multi-step reaction with 2 steps
1: 68 percent / PCl5 / petroleum ether / 1.) 0 deg C, 30 min, 2.) r.t., 45 min
2: 61 percent / montmorillonite K10 / CH2Cl2 / 40 °C
View Scheme
betulin
473-98-3

betulin

trityl chloride
76-83-5

trityl chloride

(3β)-28-(triphenylmethoxy)lup-20(29)-en-3-ol
431879-42-4

(3β)-28-(triphenylmethoxy)lup-20(29)-en-3-ol

Conditions
ConditionsYield
With dmap In N,N-dimethyl-formamide at 60℃;98%
With pyridine; dmap at 80℃;85%
With pyridine; dmap In N,N-dimethyl-formamide Reflux; regioselective reaction;76%
betulin
473-98-3

betulin

2,4,6,8-tetraacetyl-2,4,6,8-tetraazabicyclo<3,3,0>octan-3,7-dione
10543-60-9

2,4,6,8-tetraacetyl-2,4,6,8-tetraazabicyclo<3,3,0>octan-3,7-dione

betulin diacetate
1721-69-3

betulin diacetate

Conditions
ConditionsYield
With trifluoroacetic acid In chloroform at 70℃; for 1h;98%
betulin
473-98-3

betulin

A

betulonic aldehyde
4439-98-9

betulonic aldehyde

B

betulinic aldehyde
13159-28-9, 92594-07-5

betulinic aldehyde

Conditions
ConditionsYield
With [bis(acetoxy)iodo]benzene; 1,5-dimethyl-9-azanoradamantane N-oxyl In dichloromethane at 25℃; for 0.75h; Reagent/catalyst; Inert atmosphere;A 51%
B 97%
With pyridinium chlorochromate In dichloromethane at 20℃; for 1.5h;A 82%
B 17%
With 1‐methyl‐2‐azaadamantane‐N‐oxyl; [bis(acetoxy)iodo]benzene In dichloromethane at 20℃; for 2h; Catalytic behavior; Reagent/catalyst;A 51%
B 49%
betulin
473-98-3

betulin

betulinic aldehyde
13159-28-9, 92594-07-5

betulinic aldehyde

Conditions
ConditionsYield
With N-chloro-succinimide; 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; tetrabutyl-ammonium chloride; sodium hydrogencarbonate; potassium carbonate In tetrahydrofuran; water at 20℃;97%
With 2,2,6,6-tetramethyl-piperidine-N-oxyl; sodium chlorite; tetrabutylammomium bromide; sodium hypochlorite In phosphate buffer; dichloromethane at 35℃;92%
With 2,2,6,6-tetramethyl-piperidine-N-oxyl; tetrabutylammomium bromide; sodium hypochlorite In phosphate buffer; dichloromethane at 30℃; pH=6.8;87%
chloro-trimethyl-silane
75-77-4

chloro-trimethyl-silane

betulin
473-98-3

betulin

O,O'-bis-(trimethylsilyl)-betulin
212708-99-1

O,O'-bis-(trimethylsilyl)-betulin

Conditions
ConditionsYield
With pyridine at 0 - 20℃; for 3h;97%
With 1H-imidazole In dichloromethane at 25℃; for 3h;
With 1H-imidazole In dichloromethane at 0℃;
maleic anhydride
108-31-6

maleic anhydride

betulin
473-98-3

betulin

(2Z,2′Z)-4,4′-[lup-20(29)-en-3β,28-diyl]bis(oxy)bis(4-oxobut-2-enoic acid)

(2Z,2′Z)-4,4′-[lup-20(29)-en-3β,28-diyl]bis(oxy)bis(4-oxobut-2-enoic acid)

Conditions
ConditionsYield
With N,N-dimethyl-aniline In benzene for 50h; Reflux;97%
phthalic anhydride
85-44-9

phthalic anhydride

betulin
473-98-3

betulin

betulin 3,28-bishemiphthalate
2519-35-9

betulin 3,28-bishemiphthalate

Conditions
ConditionsYield
With pyridine for 15h; Addition; Heating;96%
With pyridine; dmap for 30h; Heating;76%
Stage #1: phthalic anhydride; betulin With pyridine; dmap for 37h; Heating / reflux;
Stage #2: With hydrogenchloride In water; ethyl acetate
76%
With dmap for 24h;
betulin
473-98-3

betulin

19β,28-epoxy-A-neo-5β-methyl-25-nor-18α-olean-9(10)-ene

19β,28-epoxy-A-neo-5β-methyl-25-nor-18α-olean-9(10)-ene

Conditions
ConditionsYield
With bithmuth(III) triflate hydrate In dichloromethane for 8h; Reflux;96%
3,4-dihydro-2H-pyran
110-87-2

3,4-dihydro-2H-pyran

betulin
473-98-3

betulin

3-hydroxy-28-[(tetrahydro-2H-pyran-2-yl)oxy]lup-20(29)-ene
189571-52-6

3-hydroxy-28-[(tetrahydro-2H-pyran-2-yl)oxy]lup-20(29)-ene

Conditions
ConditionsYield
With pyridinium p-toluenesulfonate In dichloromethane for 72h; Ambient temperature;95%
With pyridinium p-toluenesulfonate In dichloromethane at 20℃; for 20h;80%
With pyridinium p-toluenesulfonate In dichloromethane at 20℃; for 72h; Inert atmosphere;57%
bromobutyric acid
2623-87-2

bromobutyric acid

betulin
473-98-3

betulin

3β-hydroxylup-20(29)-en-28-yl 4-bromobutanoate

3β-hydroxylup-20(29)-en-28-yl 4-bromobutanoate

Conditions
ConditionsYield
With dmap; dicyclohexyl-carbodiimide In dichloromethane at 20℃; Steglich Esterification;95%
With dmap; dicyclohexyl-carbodiimide In dichloromethane at 20℃; for 24h;80%
betulin
473-98-3

betulin

acetylene
74-86-2

acetylene

C32H52O2

C32H52O2

Conditions
ConditionsYield
With potassium hydroxide In dimethyl sulfoxide at 80℃; for 2.5h;95%
nicotinic acid
59-67-6

nicotinic acid

betulin
473-98-3

betulin

3β,28-di-O-nicotinoyl-lupa-20(29)-ene
473806-27-8

3β,28-di-O-nicotinoyl-lupa-20(29)-ene

Conditions
ConditionsYield
With dmap; dicyclohexyl-carbodiimide In dichloromethane for 24h; regioselective reaction;95%
3-ethyl-3-methylglutaric anhydride
6970-57-6

3-ethyl-3-methylglutaric anhydride

betulin
473-98-3

betulin

3-Ethyl-3-methyl-pentanedioic acid mono-[(1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-(3-carboxymethyl-3-methyl-pentanoyloxy)-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-3a-ylmethyl] ester

3-Ethyl-3-methyl-pentanedioic acid mono-[(1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-(3-carboxymethyl-3-methyl-pentanoyloxy)-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-3a-ylmethyl] ester

Conditions
ConditionsYield
With dmap In pyridine at 95℃;94%
With pyridine; dmap at 95℃;
betulin
473-98-3

betulin

betulin diphosphate

betulin diphosphate

Conditions
ConditionsYield
Stage #1: betulin With pyridine; trichlorophosphate In 1,4-dioxane at 10 - 20℃; for 24h;
Stage #2: With water In 1,4-dioxane
94%
With pyridine; trichlorophosphate In acetone at 0℃; for 1h;69%
betulin
473-98-3

betulin

30-iodolup-20(29)-ene-3β,28-diol
1429785-14-7

30-iodolup-20(29)-ene-3β,28-diol

Conditions
ConditionsYield
With iodine In N,N-dimethyl acetamide at 25℃; for 0.0166667h; Kinetics; Thermodynamic data; Concentration; Temperature; Solvent;94%
betulin
473-98-3

betulin

pyridine-3-carbonyl chloride hydrochloride
20260-53-1

pyridine-3-carbonyl chloride hydrochloride

betulin dinicotinate

betulin dinicotinate

Conditions
ConditionsYield
With pyridine; tributyl-amine at 0 - 20℃; for 4h;93.6%
betulin
473-98-3

betulin

betulonic aldehyde
4439-98-9

betulonic aldehyde

Conditions
ConditionsYield
With oxalyl dichloride; dimethyl sulfoxide In dichloromethane at -30℃; Svern oxidation;93%
With oxalyl dichloride; dimethyl sulfoxide; triethylamine In dichloromethane at -15 - 20℃; Swern oxidation;93%
With oxalyl dichloride; dimethyl sulfoxide; triethylamine In dichloromethane Swern oxidation;90%
betulin
473-98-3

betulin

Cyclohexanecarboxylic acid
98-89-5

Cyclohexanecarboxylic acid

A

Cyclohexanecarboxylic acid (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-hydroxy-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-3a-ylmethyl ester

Cyclohexanecarboxylic acid (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-hydroxy-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-3a-ylmethyl ester

B

Cyclohexanecarboxylic acid (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-3a-hydroxymethyl-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-9-yl ester

Cyclohexanecarboxylic acid (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-3a-hydroxymethyl-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-icosahydro-cyclopenta[a]chrysen-9-yl ester

C

C44H70O4

C44H70O4

Conditions
ConditionsYield
tetrachlorobis(tetrahydrofuran)hafnium(IV) In chlorobenzene for 16h; Heating;A 93%
B n/a
C 7%
betulin
473-98-3

betulin

2-Methylpropionic anhydride
97-72-3

2-Methylpropionic anhydride

C38H62O4

C38H62O4

Conditions
ConditionsYield
With dmap for 1h;93%
With dmap In dichloromethane for 1h;93%
pyridine-4-carboxylic acid
55-22-1

pyridine-4-carboxylic acid

betulin
473-98-3

betulin

betulin 3β,28-di-O-isonicotinate

betulin 3β,28-di-O-isonicotinate

Conditions
ConditionsYield
With dmap; dicyclohexyl-carbodiimide In dichloromethane at 22℃; for 24h; regioselective reaction;93%
succinic acid anhydride
108-30-5

succinic acid anhydride

betulin
473-98-3

betulin

3,28-dihydroxylupan bis(hydrogen succinate)

3,28-dihydroxylupan bis(hydrogen succinate)

Conditions
ConditionsYield
With pyridine for 15h; Addition; Heating;92%
With pyridine for 8h; Reflux;92%
Stage #1: succinic acid anhydride; betulin With pyridine; dmap for 12h; Heating / reflux;
Stage #2: With hydrogenchloride In water; ethyl acetate
67%
betulin
473-98-3

betulin

1,1,1,3,3,3-hexamethyl-disilazane
999-97-3

1,1,1,3,3,3-hexamethyl-disilazane

O,O'-bis-(trimethylsilyl)-betulin
212708-99-1

O,O'-bis-(trimethylsilyl)-betulin

Conditions
ConditionsYield
With phosphomolybdic acid In chloroform for 0.833333h; Heating;92%
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