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
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inquiryhebei yanxi chemical co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and developm
Cas:4075-07-4
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inquiryTIANFUCHEM-- 4075-07-4--High purity (6R)-5,6,7,8-TETRAHYDRO-L-BIOPTERIN DIHYDROCHLORIDE in stock Our company was built in 2009 with an ISO certificate.In the past 10 years, we have grown up as a famous fine chemicals supplier in China And
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inquiryOur advantages: 1, High quality with competitive price: 1) Standard:BP/USP/EP/Enterprise standard 2) All Purity≥99% 3) We are manufacturer and can provide high quality products with factory price. 2, Fast and safe delivery 1) Parcel can be sent
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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
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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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inquiry4,16-Androstadien-3-one CAS:4075-07-4 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 in
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Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryOur 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,
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Min.Order:10 Kilogram
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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
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inquiryminimum order qty. 10 gram
Cas:4075-07-4
Min.Order:10 Gram
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Type:Trading Company
inquiryTriumph has the complete production of G- KG - MT service chain,we can make the new technology into productivity quickly in the research and development of new products. Main Service 1.Own made fine chemical products 2.Out sourcin
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Min.Order:1 Gram
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Type:Lab/Research institutions
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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Min.Order:10 Gram
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Type:Lab/Research institutions
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FOB Price: $8.2 / 8.8
Type:Trading Company
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Type:Lab/Research institutions
inquiryOur Advantages A. International Top level TechnologyOur company owned biomedicine experts are famous at home and abroad with rich experience in research and development in the field of efficient chiral functional molecules research and development an
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FOB Price: $18.0 / 20.0
Type:Trading Company
inquiryZhenyu 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
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Min.Order:1 Kilogram
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Type:Lab/Research institutions
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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Min.Order:1 Gram
Negotiable
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
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Type:Trading Company
inquiryGOLDEN PHARMA CO.,LIMITED.is a professional pharmaceutical company,our team have more than 20years expereince in pharmaceutical production and sales. we are a professional technical enterprise specializing in the R & D, production,QA regulation
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
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Type:Trading Company
inquiryWe produce carbomer by our own factory,carbomer 940 is our best seller.It is used for cosmetic and medical.And we also become agent for lubrizol.Our carbomer 940 get high viscosity and good transparency.The price will depond on the market,surely supp
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
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Type:Lab/Research institutions
inquiryR & D enterprises have their own stock in stock Package:1kg Application:pharmaceutical intermediates
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17β-methoxycarbonyloxy-androst-4-en-3-one
4,16-androstadien-3-one
Conditions | Yield |
---|---|
In toluene at 460℃; | 90% |
In acetone; toluene | 90% |
cesium acetate
Chloro-methanesulfonic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester
A
4,16-androstadien-3-one
B
3-oxoandrost-4-en-17α-yl acetate
Conditions | Yield |
---|---|
With 18-crown-6 ether In benzene for 72h; Heating; | A 10% B 76% |
Chloro-methanesulfonic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester
A
4,16-androstadien-3-one
B
3-oxoandrost-4-en-17α-yl acetate
Conditions | Yield |
---|---|
With 18-crown-6 ether; cesium acetate In benzene for 72h; Heating; | A 10% B 76% |
Conditions | Yield |
---|---|
Stage #1: 17β-tosyloxyandrostan-4-en-3-one With tetrabutylammonium acetate In 1-methyl-pyrrolidin-2-one at 160℃; for 4h; Stage #2: With potassium hydroxide In ethanol at 20℃; for 48h; | 61% |
With aluminum oxide In benzene for 20h; Heating; |
Conditions | Yield |
---|---|
With copper(l) iodide; 2,2,6,6-tetramethylheptane-3,5-dione; potassium carbonate In dimethyl sulfoxide at 100℃; for 24h; Reagent/catalyst; Solvent; Temperature; Inert atmosphere; | A 55% B 15 %Spectr. |
With copper(l) iodide; potassium carbonate; butane-2,3-dione dioxime In dimethyl sulfoxide at 100℃; for 24h; Reagent/catalyst; Inert atmosphere; | A 8 %Spectr. B 72 %Spectr. |
4,16-androstadien-3-one
Conditions | Yield |
---|---|
at 600℃; under 0.00750075 Torr; for 1h; Flash vacuum pyrolysis; | 29% |
3-oxoandrost-4-en-17α-yl benzoate
4,16-androstadien-3-one
Conditions | Yield |
---|---|
at 300℃; Erhitzen unter Stickstoff; | |
at 300℃; |
Conditions | Yield |
---|---|
With cyclohexanone; aluminum isopropoxide; toluene |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 76 percent / pyridine; various solvent(s) / 24 h / 0 °C 2: 90 percent / toluene / 460 °C View Scheme | |
(i) MeSO2Cl, Py, (ii) LiCl, DMF; Multistep reaction; |
testosterone triflate
B
17-methyl-18-norandrosta-4,13(17)-dien-3-one
C
4,16-androstadien-3-one
Conditions | Yield |
---|---|
With lithium azide In N,N-dimethyl-formamide at 25℃; for 0.5h; Substitution; |
testosterone triflate
A
17-methyl-18-norandrosta-4,13(17)-dien-3-one
B
4,16-androstadien-3-one
Conditions | Yield |
---|---|
With sodium azide In N,N-dimethyl-formamide at 90℃; for 0.0833333h; Substitution; |
Chloro-methanesulfonic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester
B
17-methyl-18-norandrosta-4,13(17)-dien-3-one
C
4,16-androstadien-3-one
Conditions | Yield |
---|---|
With lithium azide In N,N-dimethyl-formamide at 90℃; for 9h; Substitution; |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: pyridine / 0 °C 2: LiN3 / dimethylformamide / 9 h / 90 °C View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 100 percent / pyridine / 0.25 h / 0 - 20 °C 2: 10 percent / 18-crown-6 / benzene / 72 h / Heating View Scheme | |
Multi-step reaction with 2 steps 1: 100 percent / pyridine / 0.25 h / 0 - 20 °C 2: 10 percent / CsOAc, 18-crow-6 / benzene / 72 h / Heating View Scheme |
Conditions | Yield |
---|---|
In ethyl acetate |
Conditions | Yield |
---|---|
In water; cyclohexanone; toluene |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrogenchloride / ethanol; water / 2.5 h / Reflux 2: potassium carbonate; 2,2,6,6-tetramethylheptane-3,5-dione; copper(l) iodide / dimethyl sulfoxide / 24 h / 100 °C / Inert atmosphere View Scheme |
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrogenchloride / ethanol; water / 2.5 h / Reflux 2: potassium carbonate; indole; copper(l) iodide; N,N`-dimethylethylenediamine / dimethyl sulfoxide / 24 h / 100 °C / Inert atmosphere View Scheme |
3-methoxyandrosta-3,5-dien-17-one hydrazone
B
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: triethylamine; iodine / 1,4-dioxane / 0.5 h 2: hydrogenchloride / ethanol; water / 2.5 h / Reflux 3: potassium carbonate; 2,2,6,6-tetramethylheptane-3,5-dione; copper(l) iodide / dimethyl sulfoxide / 24 h / 100 °C / Inert atmosphere View Scheme |
3-methoxyandrosta-3,5-dien-17-one hydrazone
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: triethylamine; iodine / 1,4-dioxane / 0.5 h 2: hydrogenchloride / ethanol; water / 2.5 h / Reflux 3: potassium carbonate; indole; copper(l) iodide; N,N`-dimethylethylenediamine / dimethyl sulfoxide / 24 h / 100 °C / Inert atmosphere View Scheme |
3-methoxyandrosta-3,5-dien-17-one
B
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: hydrazine hydrate; triethylamine / ethanol / 2 h / Reflux 2: triethylamine; iodine / 1,4-dioxane / 0.5 h 3: hydrogenchloride / ethanol; water / 2.5 h / Reflux 4: potassium carbonate; 2,2,6,6-tetramethylheptane-3,5-dione; copper(l) iodide / dimethyl sulfoxide / 24 h / 100 °C / Inert atmosphere View Scheme |
3-methoxyandrosta-3,5-dien-17-one
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: hydrazine hydrate; triethylamine / ethanol / 2 h / Reflux 2: triethylamine; iodine / 1,4-dioxane / 0.5 h 3: hydrogenchloride / ethanol; water / 2.5 h / Reflux 4: potassium carbonate; indole; copper(l) iodide; N,N`-dimethylethylenediamine / dimethyl sulfoxide / 24 h / 100 °C / Inert atmosphere View Scheme |
17-iodoandrosta-4,16-dien-3-one
4,16-androstadien-3-one
Conditions | Yield |
---|---|
With indole; copper(l) iodide; potassium carbonate; N,N`-dimethylethylenediamine In dimethyl sulfoxide at 100℃; for 24h; Reagent/catalyst; Inert atmosphere; | 60 %Spectr. |
Conditions | Yield |
---|---|
With copper(l) iodide; N,N,N,N,-tetramethylethylenediamine; potassium carbonate; triphenylphosphine In dimethyl sulfoxide at 100℃; Reagent/catalyst; Sonogashira Cross-Coupling; Inert atmosphere; | A 22 %Spectr. B 11 %Spectr. |
4,16-androstadien-3-one
A
4α,5α-epoxyandrost-16-en-3-one
Conditions | Yield |
---|---|
With sodium hydroxide; dihydrogen peroxide In methanol at 0℃; for 24h; | A 13% B 76% |
4,16-androstadien-3-one
16β-hydroxyandrost-4-en-3-one
Conditions | Yield |
---|---|
Stage #1: 4,16-androstadien-3-one With mercury(II) diacetate In tetrahydrofuran; water at 20℃; for 72h; Stage #2: With sodium hydroxide; sodium tetrahydroborate In tetrahydrofuran; water for 0.0333333h; | 45% |
4,16-androstadien-3-one
androsta-1,4,16-trien-3-one
Conditions | Yield |
---|---|
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In toluene at 80℃; for 15h; | 43% |
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In 1,4-dioxane |
4,16-androstadien-3-one
Androstene oxide
Conditions | Yield |
---|---|
With Perbenzoic acid; chloroform |
4,16-androstadien-3-one
androsta-4,6,16-trien-3-one
Conditions | Yield |
---|---|
With sodium hydroxide; chloranil; acetic acid In methanol; n-heptane; water; toluene; tert-butyl alcohol; benzene | |
With chloranil; acetic acid In tert-butyl alcohol |
4,16-androstadien-3-one
orthoformic acid triethyl ester
3-ethoxy-androsta-3,5,16-triene
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In 1,4-dioxane |
Conditions | Yield |
---|---|
With hydrogen; Wilkinson's catalyst In ethanol for 4h; Ambient temperature; | 1.0 g |
Conditions | Yield |
---|---|
With ethanol; water; lithium tri-sec-butyl(hydrido)borate 1.) THF, r.t., 3 h; 2.) -55 deg C; Yield given. Multistep reaction. Yields of byproduct given; |
4,16-androstadien-3-one
16β-trichloroacetoxyandrost-4-en-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: mercuric acetate / H2O; tetrahydrofuran / 72 h / 20 °C 1.2: 45 percent / 3.0 M NaOH; NaBH4 / H2O; tetrahydrofuran / 0.03 h 2.1: 83 percent / Et3N; N,N-dimethylaminopyridine / CH2Cl2 / 2.5 h / 0 - 20 °C View Scheme |
4,16-androstadien-3-one
5α-androstan-5-ol
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 1.0 g / hydrogen / chloro-tris(triphenylphosphine)rhodium / ethanol / 4 h / Ambient temperature 2: 1.) 1,2-ethanedithiol, boron trifluoride etherate; 2.) methanol / 2.) Raney-Ni / 1.) acetic acid, r.t., 2 d; 2.) 20 h 3: 1.) m-chloroperbenzoic acid; 2.) lithium aluminium hydride / 1.) CHCl3, r.t., 1 h; 2.) dioxane, reflux, 4 h View Scheme |
4,16-androstadien-3-one
3H-androst-4-ene
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 1.0 g / hydrogen / chloro-tris(triphenylphosphine)rhodium / ethanol / 4 h / Ambient temperature 2: 1.) 1,2-ethanedithiol, boron trifluoride etherate; 2.) methanol / 2.) Raney-Ni / 1.) acetic acid, r.t., 2 d; 2.) 20 h View Scheme |
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 1.0 g / hydrogen / chloro-tris(triphenylphosphine)rhodium / ethanol / 4 h / Ambient temperature 2: 1.) 1,2-ethanedithiol, boron trifluoride etherate; 2.) methanol / 2.) Raney-Ni / 1.) acetic acid, r.t., 2 d; 2.) 20 h 3: 1.) m-chloroperbenzoic acid; 2.) lithium aluminium hydride / 1.) CHCl3, r.t., 1 h; 2.) dioxane, reflux, 4 h View Scheme |
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: toluene-4-sulfonic acid / 1,4-dioxane 2: 2,3-dicyano-5,6-dichloro-p-benzoquinone / 1,4-dioxane View Scheme |
4,16-androstadien-3-one
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: toluene-4-sulfonic acid / 1,4-dioxane 2: (i) N-iodo-succinimide, (ii) (hydrolysis) View Scheme |
4,16-androstadien-3-one
3-ethoxy-6-chloro-androsta-3,5,16-triene
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: toluene-4-sulfonic acid / 1,4-dioxane 2: (i) N-chloro-succinimide, acetone, H2O, (ii) (hydrolysis) 3: toluene-4-sulfonic acid View Scheme |
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