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:2681-55-2
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inquiryWelcome 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
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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
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inquiryMethyl-3-Oxo-4-androstene-17β-carboxylate (F4) CAS:2681-55-2 Finasteride intermediate Related: 3-Oxo-4-androstene-17β-carboxylic acid Finasteride Name Methyl 3-oxo-4-androstene-17beta-carboxylate
Cas:2681-55-2
Min.Order:100 Gram
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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
Cas:2681-55-2
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inquiryOur 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:2681-55-2
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inquiryWith 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 manufacturin
Cas:2681-55-2
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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
Cas:2681-55-2
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inquiryOur Advantage: high quality with competitive price High quality standard: BP/USP/EP Enterprise standard All purity customized Fast and safe delivery We have reliable forwarder who can help us deliver our goods more fast and safe. We
Cas:2681-55-2
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FOB Price: $0.5 / 1.0
Type:Trading Company
inquiryAdvantage : LIDE PHARMACEUTICALS LTD. is a mid-small manufacturing-type enterprise, engaged in pharmaceutical intermediates of R&D, custom-made and production, and also involving trading chemicals for export. We have established the R&
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inquiry1. Guaranteed purity; 2. Large quantity in stock; 3. Largest manufacturer; 4. Best service after shipment with email; 5. High quality & competitive price; Appearance:White Crystalline Powder Storage:Store in sealed conta
Cas:2681-55-2
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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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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
Cas:2681-55-2
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inquiryOur Services 1. New Molecules R&D 2. Own test center HPLC NMR GC LC-MS 3. API and Intermediates from China reputed manufacturers 4. Documents support COA MOA MSDS DMF open part Our advantages 1. Government awarded company. Top 100 enter
Cas:2681-55-2
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inquiryJ&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
Cas:2681-55-2
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inquiryWhy 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
Cas:2681-55-2
Min.Order:1 Gram
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inquiryWe are one of a few suppliers that can offer custom synthesis service of this product We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to prov
Cas:2681-55-2
Min.Order:100 Gram
FOB Price: $100.0 / 2000.0
Type:Lab/Research institutions
inquiryProduct name: Methyl 3-Oxo-4-Androstene-17beta-Carboxylate CAS No.: 2681-55-2 Molecule Formula:C21H30O3 Molecule Weight:330.46 Purity: 99.0% Package: 25kg/drum Description:White powder Manufacture Standards:Enterprise Standard TE
Cas:2681-55-2
Min.Order:1 Kilogram
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Type:Lab/Research institutions
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,
Cas:2681-55-2
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
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
Cas:2681-55-2
Min.Order:1 Kilogram
FOB Price: $18.0 / 20.0
Type:Trading Company
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
Cas:2681-55-2
Min.Order:1 Gram
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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:2681-55-2
Min.Order:1 Metric Ton
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inquiryAppearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea
Cas:2681-55-2
Min.Order:0
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Type:Manufacturers
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
Cas:2681-55-2
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inquirySuperior quality, moderate price & quick delivery. Appearance:white powder Storage:Sealed and stored in a cool,dark place Package:25kg/drum, or as per your request. Application:For medicine , pesticide intermediates Transportation:as per yo
Cas:2681-55-2
Min.Order:1 Kilogram
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Type:Trading Company
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
Cas:2681-55-2
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Type:Trading Company
inquiryProduct Name: Methyl 3-oxo-4-androstene-17beta-carboxylate Synonyms: METHYL 4-ANDROSTEN-3-ONE-17BETA-CARBOXYLINATE;Methyl-3-oxo-4-androstene-17beta-… Package:25kg/drum or as your demand Transportation:FOB Guangzhou or as your demand
Cas:2681-55-2
Min.Order:0
Negotiable
Type:Manufacturers
inquiryShanghai Lonwin Chemical company is a subsidiary of Lonwin Industry Group Limited, was established in 2011 and is headquartered in Shanghai, adjacent to China National Convention and Exhibition Center and Hongqiao transportation hub.Lonwinchem is
Cas:2681-55-2
Min.Order:100 Kilogram
FOB Price: $100.0 / 150.0
Type:Other
inquiryhigh purity,in stock Package:25kg/drum,or as per customers'demand Application:API,or Intermediates,fine chemicals Transportation:air,sea,courier
Cas:2681-55-2
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Type:Lab/Research institutions
inquiryJinhua huayi chemical co., ltd. is dedicated to the development, production and marketing of chemicals. On the basis of equality and mutual benefit, and under the principle of customer first, credit first, quality first, we are ready to join hands
Cas:2681-55-2
Min.Order:100 Gram
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Type:Lab/Research institutions
inquiry17β-androstane-4-ene-3-keto-17-formaldehyde
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With tert.-butylhydroperoxide; potassium iodide In methanol at 20℃; for 6.5h; Reagent/catalyst; Reflux; | 93% |
androst-4-en-3-one-17β-carboxylic acid
temozolomide
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With sodium carbonate In 1,4-dioxane; water at 60℃; for 4h; Sealed tube; | 89% |
methyl 5-androsten-3β-ol-17β-carboxylate
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With cyclohexanone; aluminum isopropoxide In toluene | 87% |
With aluminum isopropoxide In cyclohexanone; toluene at 110℃; for 3h; Oppenauer Oxidation; Inert atmosphere; | 82% |
With aluminum isopropoxide In cyclohexanone; toluene for 4h; Oxidation; Oppennauer oxidation; Heating; | 70.62% |
tert-butyl methyl ether
androst-4-en-3-one-17β-carboxylic acid
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With iron(III) trifluoromethanesulfonate at 90℃; Schlenk technique; | 79% |
Conditions | Yield |
---|---|
With [2,2]bipyridinyl; bis(1,5-cyclooctadiene)nickel (0) In toluene at 20℃; for 18h; Sealed tube; chemoselective reaction; | 64% |
methanol
17-Acetoxy-21-(acetylthio)-4-pregnen-3,20-dion
A
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
B
(17R)-4-Androsten-17-spiro-3'-(1',2'-dithiolan)-3,4'-dion
Conditions | Yield |
---|---|
With sodium azide for 22h; Ambient temperature; | A 48% B 10% |
17-Acetoxy-21-(acetylthio)-4-pregnen-3,20-dion
A
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
B
(17R)-4-Androsten-17-spiro-3'-(1',2'-dithiolan)-3,4'-dion
Conditions | Yield |
---|---|
With sodium azide In methanol at 50℃; for 1.5h; | A 8% B 39% |
diazomethane
androst-4-en-3-one-17β-carboxylic acid
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With diethyl ether |
methyl 3-oxo-androst-1,4-diene-17β-carboxylate
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
Hydrogenation; |
2β,4β-dibromo-3-oxo-5β-androstane-17β-carboxylic acid methyl ester
A
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
B
3-oxo-5β-androst-1-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With acetone; sodium iodide Erwaermen des Reaktionsprodukts mit Zink-Pulver und Aethanol; |
methyl 5-androsten-3β-ol-17β-carboxylate
cyclohexanone
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With aluminum isopropoxide; toluene |
methyl 5-androsten-3β-ol-17β-carboxylate
cyclohexanone
aluminum isopropoxide
toluene
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
2β,4β-dibromo-3-oxo-5β-androstane-17β-carboxylic acid methyl ester
A
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With acetone; sodium iodide Erwaermen des Reaktionsprodukts mit Zink-Pulver und Aethanol; |
3β,5-dihydroxy-21-nor-5β-pregnanoic acid-(20)-methyl ester
acetic acid
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
Erhitzen des Reaktionsprodukts mit Essigsaeure; |
A
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With chromium(VI) oxide In acetone at 20℃; | A 50 mg B 290 mg |
etienic acid
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: cesium fluoride / dimethylformamide / 24 h / 20 °C 2: 3.1 g / cyclohexanone; aluminium isopropoxide / toluene / Heating View Scheme | |
Multi-step reaction with 2 steps 1: 82 percent / p-toluenesulfonic acid / 5 h / Heating 2: 87 percent / Al(i-PrO)3, cyclohexanone / toluene View Scheme | |
Multi-step reaction with 2 steps 1: Reaktion ueber mehrere Stufen 2: diethyl ether View Scheme | |
Multi-step reaction with 2 steps 1: sulfuric acid / 3 h / Reflux 2: aluminum isopropoxide / toluene; cyclohexanone / 3 h / 110 °C / Inert atmosphere View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: I2 / 1.5 h / Heating 2: methanol / 1 h / Heating 3: 70.62 percent / Al(i-PrO)3 / cyclohexanone; toluene / 4 h / Heating View Scheme | |
Multi-step reaction with 3 steps 1: I2 / 1 h / Heating 2: methanol / 1 h / Heating 3: 1.) Al(i-PrO)3, 2.) Supercel, Darco KB / 1.) toluene, cyclohexanone, reflux, 1 h, 2.) toluene, cyclohexanone, water, 15 min View Scheme | |
Multi-step reaction with 3 steps 1: iodine / 1.5 h / 90 °C / Inert atmosphere; Reflux 2: sodium methylate / 16 h / Inert atmosphere; Reflux 3: cyclohexanone; aluminum isopropoxide / toluene / 4 h / Reflux; Inert atmosphere View Scheme |
pregnenolone 21-pyridinium iodide
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: methanol / 1 h / Heating 2: 70.62 percent / Al(i-PrO)3 / cyclohexanone; toluene / 4 h / Heating View Scheme | |
Multi-step reaction with 2 steps 1: methanol / 1 h / Heating 2: 1.) Al(i-PrO)3, 2.) Supercel, Darco KB / 1.) toluene, cyclohexanone, reflux, 1 h, 2.) toluene, cyclohexanone, water, 15 min View Scheme | |
Multi-step reaction with 2 steps 1: sodium methylate / 16 h / Inert atmosphere; Reflux 2: cyclohexanone; aluminum isopropoxide / toluene / 4 h / Reflux; Inert atmosphere View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 1.) NaOBr, 2.) HCl / 1.) dioxane, water 2: 82 percent / p-toluenesulfonic acid / 5 h / Heating 3: 87 percent / Al(i-PrO)3, cyclohexanone / toluene View Scheme | |
Multi-step reaction with 3 steps 1.1: sodium hypobromide / water; 1,4-dioxane / 3 h / 5 - 8 °C 1.2: 0.25 h / Reflux 1.3: 24 h / 5 - 90 °C 2.1: sulfuric acid / 3 h / Reflux 3.1: aluminum isopropoxide / toluene; cyclohexanone / 3 h / 110 °C / Inert atmosphere View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 68.3 percent / H2O2, 0.2N NaOH / hemin / methanol / 4 h / 20 °C View Scheme |
21-(Acetylthio)-17-hydroxy-4-pregnen-3,20-dion
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 73 percent / DMAP / bis-(2-methoxy-ethyl) ether / 17 h / Ambient temperature 2: 48 percent / NaN3 / 22 h / Ambient temperature View Scheme | |
Multi-step reaction with 2 steps 1: 73 percent / DMAP / bis-(2-methoxy-ethyl) ether / 17 h / Ambient temperature 2: 8 percent / NaN3 / methanol / 1.5 h / 50 °C View Scheme |
methyl 3-oxo-5β-androstane-17β-carboxylate
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: bromine 2: NaI; acetone / Erwaermen des Reaktionsprodukts mit Zink-Pulver und Aethanol View Scheme | |
Multi-step reaction with 2 steps 1: bromine 2: NaI; acetone / Erwaermen des Reaktionsprodukts mit Zink-Pulver und Aethanol View Scheme |
methyl 5-androsten-3β-ol-17β-carboxylate
A
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
B
methyl 3-oxo-androst-4,6-diene-17β-carboxylate
Conditions | Yield |
---|---|
With 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; 2,3-dicyano-5,6-dichloro-p-benzoquinone In dichloromethane at 0 - 20℃; Overall yield = 75 %; |
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: toluene-4-sulfonic acid / tetrahydrofuran / 5 h / 5 °C / Inert atmosphere 2: n-butyllithium / 2-methyltetrahydrofuran / 6 h / -60 - -45 °C / Inert atmosphere 3: tert.-butylhydroperoxide; potassium iodide / methanol / 6.5 h / 20 °C / Reflux View Scheme |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
androst-4-en-3-one-17β-carboxylic acid
Conditions | Yield |
---|---|
With potassium hydroxide In methanol for 5h; Hydrolysis; Heating; | 100% |
With potassium hydroxide In ethanol; water | 95% |
With potassium hydroxide In methanol; water for 3h; Inert atmosphere; Reflux; | 89% |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Methyl 3-bromoandrosta-3,5-diene-17β-carboxylate
Conditions | Yield |
---|---|
With phosphorus tribromide In acetic acid for 21h; Ambient temperature; | 85% |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
3β-hydroxy-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With diisopropoxytitanium(III) tetrahydroborate In dichloromethane at -20℃; for 0.5h; | 82% |
With sodium tetrahydroborate | |
With sodium tetrahydroborate In methanol at 0℃; Reduction; |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
methyl 3-oxo-androst-1,4-diene-17β-carboxylate
Conditions | Yield |
---|---|
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In 1,4-dioxane for 48h; Reflux; | 81.2% |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
methyl 3-oxo-androst-4,6-diene-17β-carboxylate
Conditions | Yield |
---|---|
With chloranil In chloroform; tert-butyl alcohol | 70% |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
methyl iodide
C23H34O3
Conditions | Yield |
---|---|
Stage #1: 3-oxo-androst-4-ene-17β-carboxylic acid methyl ester With potassium tert-butylate In tetrahydrofuran at 0℃; for 0.0833333h; Inert atmosphere; Stage #2: methyl iodide In tetrahydrofuran at 0℃; for 1h; Inert atmosphere; | 63% |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
A
androsta-3,5-diene-17β-carboxylic acid methyl ester
B
3β-hydroxy-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With sodium tetrahydroborate |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
2ξ,6ξ-dibromo-3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With bromine |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
A
methyl 3β-hydroxy-5α-androstane-17β-carboxylate
B
3α-hydroxy-5β-androstan-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With methanol; palladium anschliessend Hydrierung an Platin in Methanol und Essigsaeure; Isolierung von Digitonin; | |
With methanol; palladium anschliessend Hydrierung an Platin in Methanol und Essigsaeure; |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
3α-acetoxy-5β-androstane-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With ethanol; alkaline solution; nickel Hydrogenation.Behandlung der neutralen Anteile des Reaktionsprodukts mit Acetanhydrid und Pyridin; |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
17β-methoxycarbonyl-5-oxo-3,5-seco-A-nor-androstan-3-oic acid
Conditions | Yield |
---|---|
With chloroform; ozone Behandeln des Reaktionsprodukts mit wss. Essigsaeure und anschliessendes Erwaermen mit Zink; | |
With potassium permanganate; sodium periodate; sodium carbonate In water; tert-butyl alcohol Heating; |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
acetic anhydride
acetyl chloride
3-acetoxy-androstadiene-(3.5)-carboxylic acid-(17β)-methyl ester
Conditions | Yield |
---|---|
at 100 - 140℃; |
Methyl formate
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
(8S,9S,10R,13S,14S,17S)-2-[1-Hydroxy-meth-(Z)-ylidene]-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-17-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With sodium methylate |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
17β-androstane-4-ene-3-keto-17-formaldehyde
Conditions | Yield |
---|---|
With lithium aluminium tetrahydride 1.) THF, room temperature, 1 h, 0 deg C; 2.) oxidation; Yield given. Multistep reaction; |
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
17β-carbomethoxyandrost-4-ene
Conditions | Yield |
---|---|
With sodium tetrahydroborate; acetic acid; trifluoroacetic acid In dichloromethane; acetonitrile at 20℃; for 2h; Reduction; |
methanol
3-oxo-androst-4-ene-17β-carboxylic acid methyl ester
A
methyl 3β-hydroxy-5α-androstane-17β-carboxylate
B
3α-hydroxy-5β-androstan-17β-carboxylic acid methyl ester
Conditions | Yield |
---|---|
anschliessend Hydrierung an Platin in Essigsaeure enthaltendem Methanol; |
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