Dayangchem's 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. DayangChem can provide different quantities
Cas:481-21-0
Min.Order:1 Kilogram
FOB Price: $3.0
Type:Lab/Research institutions
inquiry1. 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
Cas:481-21-0
Min.Order:1 Gram
FOB Price: $0.1
Type:Manufacturers
inquiryOur 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
Our company was built in 2009 with an ISO certificate.In the past 5 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
Cas:481-21-0
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryWITH 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
Cas:481-21-0
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
Type:Trading Company
inquiry1.In No Less 10 years exporting experience. you 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 Specializ
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
Cas:481-21-0
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryHenan 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
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
Why Choose Us: 1. Factory direct sales, so we can provide the competitive price and high quality product base on 8 years of production and R&D experience. 2. It is available in stock for quick shipment.Products could be packaged according to cu
Zhenyu biotech exported this product to many countries and regions at best price. if you are looking for the material's manufacturer or supplier in china, zhenyu biotech is your best choice. pls contact with us freely for getting detailed
Cas:481-21-0
Min.Order:1 Kilogram
FOB Price: $2.0
Type:Lab/Research institutions
inquiry1.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
Cas:481-21-0
Min.Order:1 Metric Ton
FOB Price: $7.0 / 8.0
Type:Trading Company
inquiryAcmec is a leading manufacturer and supplier of biochemical reagents and life science products. We have over 40,000 items in stock (real-time inventory) and offer discounted prices to registered members of the online store ( www.acmec.com.cn ) Appea
Cas:481-21-0
Min.Order:1 bottle
Negotiable
Type:Lab/Research institutions
inquiryhigh quality Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea
High qualityAppearance:White powder Storage:Room temperature Package:Aluminum bag Application:Used in producing API Transportation:By air Port:Beijing
Ansciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali
Supply top quality products with a reasonable price Application:api
Cholestane, (5α)- cas 481-21-0Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
good quality, competitive price, thoughtful after sale serviceAppearance:white powder Storage:Keep it in dry,shady and cool place Package:20mg Application:Pharma;Industry;Agricultural;chemical reaserch Transportation:by express or by sea Port:Any por
factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
Changzhou Extraordinary Pharmatech co., LTD. As a leading chemical manufacturer and supplier in China.DAS authentication is passed.We can provide the popular precursor chemicals, we have our own strong R & D team, have our own laboratories and fa
Price, service, company and transport advantage: 1. Best service, place of origin China, high quality, and reasonable price. 2. It's customers' right to choose the package (EMS, DHL, FEDEX, UPS). 3. It's customers' right
United Scientific Company Located in Shanghai of China , is a competitive player in the global specialty and fine chemical market. Fenghua has both the expertise and flexibility to produce a wide range of chemicals. Focusing on developing the innovat
The system can just identify the products information in first sheet, it is not be permitted to add or edit new sheet by userself.Our products are required in MG to Gram only. · Pharmaceutical Reference Standards· Traceable workin
Cholestane, (5α)- Storage:keep in dry and cool condition Package:25kg or according to cutomer's demand Application:Chemical research/pharma intermediate Transportation:By Sea,by Air,By courier like DHL or Fedx. Port:Shanghai/Shenzhen
FINETECH INDUSTRY LIMITED is a LONDON based CRO company providing drug discovery & development services to worldwide clients. FINETECH INDUSTRY LIMITED supplies the a-Cholestane, CAS:481-21-0 with the most competitive price and the best quality. We c
Do best quality products, erect the morality model Application:please email us, thanks
High pure standard, Quick shippment COA with HPLC, MS and NMR spectra. Package:100mg Application:pharmaceutical industry, food industry, research
CFTC?PharmaChem?is?a?service?based?company?in?China,?a?pharmachem?division?of?Changzhou?Foreign?Trade?Corp.,supplying?raw?materials,?intermediates,?APIs?and?fine?chemicals?for?the?pharmaceutical?and?specialty?chemical?industries?worldwide. Applicatio
3-bromocholestane
cholestane
Conditions | Yield |
---|---|
With triethyl borane; 1,1,2,2-tetraphenyldisilane In ethanol for 4h; Ambient temperature; | 99% |
3β-phenylselenenyl-5α-cholestane
cholestane
Conditions | Yield |
---|---|
With triethyl borane; 1,1,2,2-tetraphenyldisilane In ethyl acetate at 20℃; for 1h; Reduction; | 99% |
cholest-2-ene
cholestane
Conditions | Yield |
---|---|
With ammonium formate; palladium on activated charcoal In methanol for 2h; Heating; | 99% |
(3R,5S,8R,9S,10S,13R,14S,17R)-3-bromo-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)hexadecahydro-1H-cyclopenta[a]phenanthrene
cholestane
Conditions | Yield |
---|---|
With water; zinc In acetonitrile at 80℃; for 30h; Sealed tube; Inert atmosphere; | 97% |
With water; zinc In acetonitrile at 80℃; for 30h; Inert atmosphere; Sealed tube; | 97% |
With triethylsilane; 2,3,3,4,4,5-hexamethyl-2-hexanethiol In cyclohexane Heating; | 86% |
5α-cholestan-3β-yl adamantane-1-carboxylate
A
1-adamantanemethanol
B
1-Adamantanecarboxylic acid
C
cholestane
D
Cholestanol
Conditions | Yield |
---|---|
With 18-crown-6 ether; tert-butylamine In tetrahydrofuran at 46℃; further reagent; | A 2% B 96% C 43% D 57% |
With lithium; ethylamine at 17℃; further reagent; | A 65% B 4% C 4% D 94% |
Conditions | Yield |
---|---|
With triethylsilane; (η4-1,5-cyclooctadiene)bis(triphenylphosphine)iridium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate In dichloromethane-d2 at 50℃; for 2h; Reagent/catalyst; | 95% |
O-cholestan-3β-yl-O'-(4-fluorophenyl)thionocarbonate
cholestane
Conditions | Yield |
---|---|
With triethyl borane; diphenylsilane; oxygen In hexane; benzene at 80℃; for 0.5h; | 93% |
With triethylsilane; Perbenzoic acid for 1.5h; Heating; | 93% |
With 2,2'-azobis(isobutyronitrile); phosphoric acid In 1,4-dioxane Heating; | 93% |
With Perbenzoic acid; phenylsilane In toluene for 1.33333h; Heating; | 87% |
5α-cholestan-3β-yl adamantane-1-carboxylate
A
1-adamantanemethanol
B
N-ethyl-1-adamantanecarboxamide
C
cholestane
D
Cholestanol
Conditions | Yield |
---|---|
With lithium; ethylamine In tetrahydrofuran at -73℃; further reagent; | A 69% B 0.5% C 1% D 93% |
cholestane
Conditions | Yield |
---|---|
With 2,2'-azobis(isobutyronitrile); hypophosphorous acid; triethylamine In 1,4-dioxane; water for 2.5h; Heating; | 93% |
ethylamine
5α-cholestan-3β-yl adamantane-1-carboxylate
A
1-Adamantanecarboxylic acid
B
N-ethyl-1-adamantanecarboxamide
C
cholestane
D
Cholestanol
Conditions | Yield |
---|---|
With lithium In tetrahydrofuran at 17℃; Further byproducts given; | A 4% B 92% C 7% D 85% |
5α-cholestane-3β,6β-diyl bis-(adamantane-1-carboxylate)
A
1-Adamantanecarboxylic acid
B
cholestane
C
Cholestanol
D
5α-cholestan-6β-ol
Conditions | Yield |
---|---|
With 18-crown-6 ether; tert-butylamine Further byproducts given; | A 92% B 45% C 27% D 6% |
Thiocarbonic acid O-[(3S,5S,8R,9S,10S,13R,14S,17R)-17-((R)-1,5-dimethyl-hexyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl] ester O-phenyl ester
cholestane
Conditions | Yield |
---|---|
With triethylsilane; dibenzoyl peroxide at 110℃; for 3h; | 91% |
With 5,10-dihydro-silanthrene; ABIN In cyclohexane at 80℃; for 1h; | 85% |
cholestane
Conditions | Yield |
---|---|
With 2,2-bis(tert-butylperoxy)butane; tri-tert-butoxysilanethiol In octane for 4h; Heating; | 91% |
1-(5α-cholestan-3β-yloxythiocarbonyl)imidazole
cholestane
Conditions | Yield |
---|---|
With 2,2'-azobis(isobutyronitrile); 2,2-di-Me-5-[3-(diphenylstannyl)propyl]-1,3-dioxolan-4-one In toluene for 10h; Heating; | 91% |
Multi-step reaction with 2 steps 1: 1,8-diazabicyclo<5.4.0>undec-7-ene 2: 75 percent / Bu3SnH / azoisobutyronitrile / benzene / 80 °C View Scheme | |
Multi-step reaction with 2 steps 1: 1,8-diazabicyclo<5.4.0>undec-7-ene 2: 29 percent / Bu3SnH / azoisobutyronitrile / benzene / 80 °C View Scheme |
Conditions | Yield |
---|---|
With HSiPh3 In 1,4-dioxane at 60℃; for 2.5h; | 90% |
With triethylsilane; bis(1-methyl-1-phenylethyl)peroxide; 2,3,3,4,4,5-hexamethyl-2-hexanethiol In octane at 140℃; for 4h; also with di-t-butyl peroxide (DTBP) (initiator); | 86% |
With 2,2'-azobis(isobutyronitrile); Tris(trimethylsilyl)methane In benzene at 80℃; for 12h; | 86% |
With tri-n-butyl-tin hydride In benzene-d6 at 80℃; | 61% |
Multi-step reaction with 3 steps 2: 31 percent / phenylseleninic acid / tetrahydrofuran; diethyl ether / -78 °C 3: 49 percent / t-butylmercaptan / toluene / 1 h / Heating View Scheme |
Conditions | Yield |
---|---|
With sodium-potassium alloy; 18-crown-6 ether; tert-butylamine In tetrahydrofuran at 25℃; further reagent; | A 90% B 6% |
Conditions | Yield |
---|---|
With zinc In acetic acid at 15℃; for 0.25h; ultrasonic irradiation; | 89% |
With chloro-trimethyl-silane; zinc In dichloromethane; isopropyl alcohol at 0℃; for 3h; Clemmensen reaction; | 86% |
With hydrogenchloride; amalgamated zinc; acetic acid |
O-cholestanyl-S-methyl dithiocarbonate
cholestane
Conditions | Yield |
---|---|
With triethylsilane; 2,3,3,4,4,5-hexamethyl-2-hexanethiol; bis(1-methyl-1-phenylethyl)peroxide In octane for 4h; Mechanism; Product distribution; Heating; | 89% |
Conditions | Yield |
---|---|
With di-tert-butyl peroxide; diphenylsilane at 140℃; for 15h; | 87% |
3β-(NN-diethylaminothiocarbonyloxy)-5α-cholestane
A
cholestane
B
Cholestanol
Conditions | Yield |
---|---|
With 18-crown-6 ether; tert-butylamine In tetrahydrofuran Ambient temperature; | A 86% B 8% |
With 18-crown-6 ether In tetrahydrofuran; 1,2-dimethoxyethane | A 74% B 14% |
With 18-crown-6 ether; tert-butylamine In tetrahydrofuran Ambient temperature; further conditions; | A 58% B 40% |
cholestane
Conditions | Yield |
---|---|
With triethyl borane; Tetrakis-(p-fluorphenyl)-disilan In ethyl acetate at 20℃; for 1h; Reduction; | 85% |
(3S,5S,8R,9S,10S,13R,14S,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)hexadecahydro-1H-cyclopenta[a]phenanthren-3-yl methanesulfonate
A
cholestane
B
Cholestanol
Conditions | Yield |
---|---|
With sodium tetrahydroborate In methanol; N,N,N,N,N,N-hexamethylphosphoric triamide for 15h; Irradiation; | A 14% B 84% |
With sodium cyanide In methanol; N,N,N,N,N,N-hexamethylphosphoric triamide for 15h; Irradiation; | A 21% B 75% |
With potassium Sodium; tert-butyl alcohol; 18-crown-6 ether In tetrahydrofuran Ambient temperature; var. cat.: tris(3,6-dioxaheptyl)amine; | A 8 % Chromat. B 72% |
With potassium Sodium; tert-butyl alcohol; 18-crown-6 ether In tetrahydrofuran Ambient temperature; var. cat.: tris(3,6-dioxaheptyl)amine; | A 8% B 72 % Chromat. |
for 15h; Product distribution; Mechanism; Irradiation; different solvents and additives; |
3β-phenylselenenyl-5α-cholestane
cholestane
Conditions | Yield |
---|---|
With triphenylstannane In benzene at 120℃; for 0.5h; | 84% |
Conditions | Yield |
---|---|
With 18-crown-6 ether; tert-butylamine In tetrahydrofuran Ambient temperature; | A 12% B 83% |
N-methyl-N-<2-(NN-dimethylamino)ethyl>aminothiocarbonyloxy-5α-cholestane
A
cholestane
B
Cholestanol
Conditions | Yield |
---|---|
With 18-crown-6 ether; tert-butylamine In tetrahydrofuran Ambient temperature; | A 83% B 12% |
O-cholestan-3β-yl-O'-(4-fluorophenyl)thionocarbonate
A
cholestane
B
O-cholestanyl thionoformate
Conditions | Yield |
---|---|
With triethyl borane; diphenylsilane; oxygen In hexane; benzene at 25℃; for 0.5h; | A 82% B 8% |
neocholesteryl bromide
cholestane
Conditions | Yield |
---|---|
With potassium Sodium; tert-butyl alcohol; Tris(3,6-dioxaheptyl)amine In tetrahydrofuran Ambient temperature; var. cat.: 18-crown-6; | 80% |
3β-(NN-diethylaminocarbonyloxy)-5α-cholestane
A
cholestane
B
Cholestanol
Conditions | Yield |
---|---|
With 18-crown-6 ether; tert-butylamine In tetrahydrofuran Ambient temperature; | A 4% B 80% |
3β-formyloxy-5αH-cholestane
A
formic acid
B
cholestane
C
Cholestanol
Conditions | Yield |
---|---|
In N,N,N,N,N,N-hexamethylphosphoric triamide; water for 5h; Irradiation; | A n/a B 79% C 19% |
cholestane
Conditions | Yield |
---|---|
79% |
cholestane
Conditions | Yield |
---|---|
With d8-isopropanol; 5% rhodium-on-charcoal; 10% Pt/activated carbon; water-d2 In cyclohexane at 120℃; for 24h; Sealed tube; | 90% |
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