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:53-16-7
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inquiryWhy is SINOWAY: 1) Specialized in pharmaceutical and healthcare industrial for 34 years. 2) ISO 9001:2015 & SGS audited supplier . 3) Accept various payment terms : T.T 30-60 days. 4) We have warehouse in USA with quickly shipment . 5) We c
Cas:53-16-7
Min.Order:1 Kilogram
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Type:Trading Company
inquiryItems Standard Result Appearance white or almost white crystalline powder white crystalline powder Identif
Cas:53-16-7
Min.Order:1 Kilogram
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Type:Trading Company
inquiryAssay:99% Specification:USP31 Appearance:white crystalline powder Usage: A metabolite of 17-Estradiol Packaging: as your requirement Synonyms: (8R,13S)-3-Hydroxy-13-methyl-6,7,8,9,11,12,13,14,15,16-decahydro-
Reason for Choosing us: 1): Superior Quality and Competitive Price: Our company is a renowned pharmaceutical manufacturer with more than 15 years experiences in China and all powders are supplying from our factory directly. 2): Fast ,Sa
Cas:53-16-7
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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:Refrigerator Package:1kg/foi
Cas:53-16-7
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inquiryEstrone CAS No.:53-16-7 Name: Estrone Synonyms: 1,3,5(10)-Estratrien-3-ol-17-one; 3beta-Hydroxyestra-1,3,5(10)-trien-17-one; 3-Hydroxy-1,3,5(10)-estratrien-17-one; beta-Estrone Molecular Structure
Cas:53-16-7
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Type:Other
inquiryThe 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
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
Cas:53-16-7
Min.Order:1 Gram
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inquiryADVANTAGE: 1. More than 3,000 Chinese medicine reference substances / standard products available from stock, issued on the same day, multiple cities can be delivered the next day 2. The products are provided with COA, HPLC, NMR, quality assurance,
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
Cas:53-16-7
Min.Order:1 Kilogram
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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
Name:Estrone CAS NO:13425-31-5 Grade:Medical scientific research and export Molecular formula:C18H22O2 Molecular weight:270.3661 Product Quality 12 years of chemical raw materials Mature operation of the industry System stability Data sto
Cas:53-16-7
Min.Order:25 Kilogram
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Type:Other
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:53-16-7
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryLIDE PHARMACEUTICALS LIMITED is a professional chemicals and APIs leading manufacturer in China. Our core business line covers APIs, Intermediates, Herb extract, etc.
Cas:53-16-7
Min.Order:1 Kilogram
FOB Price: $0.9 / 1.0
Type:Lab/Research institutions
inquiryHigh Quality Powder Estrone CAS 53-16-7 Chemical Name estrone Synonyms Femidyn; Estrin; Estra-1,3,5(10)-trien-17-one, 3-hydroxy-; 3-Hydroxy-1,3,5(10)-estratrien-17-one; Estrone; Expand CAS No.
Cas:53-16-7
Min.Order:5 Kilogram
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Type:Trading Company
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:53-16-7
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
Type:Trading Company
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
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
Cas:53-16-7
Min.Order:1 Metric Ton
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Type:Trading Company
inquiryAppearance:White crystalline powder Storage:Room temperature Package:1kg/drum, 25kg/drum Application:API Transportation:Express/Air/Sea Port:Any port in china
Advantages: Hubei XinRunde Chemical Co., Ltd is a renowned pharmaceutical manufacturer. We can offer high quality products at competitive price in quick delivery with 100% custom pass guaranteed. Never stop striving to offer our best s
Cas:53-16-7
Min.Order:10 Gram
Negotiable
Type:Other
inquiryHanways chempharm is a specialized company concentrating on the R&D, production, marketing and technical service of APIs and pharmaceutical intermediates. The marketing department is located in Wuhan. We have two GMP facilities in Hubei Pr
Cas:53-16-7
Min.Order:1 Kilogram
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Type:Trading Company
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
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
Cas:53-16-7
Min.Order:10 Gram
FOB Price: $1.25
Type:Trading Company
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
Cas:53-16-7
Min.Order:1 Kilogram
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Type:Trading Company
inquiryQingdao 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, steroids, pharmaceutical i
Cas:53-16-7
Min.Order:10 Gram
Negotiable
Type:Lab/Research institutions
inquiryWe generally use secure shipping methods that do not require you to do any customs clearance. Free shipping to your address without worrying about any customs issues. We have a professional customs clearance team to 100% guarantee the safe delivery o
Cas:53-16-7
Min.Order:1 Kilogram
Negotiable
Type:Trading Company
inquiryHello, 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
Product Detail Minimum Order Qty. 10 Gram
Cas:53-16-7
Min.Order:10 Gram
Negotiable
Type:Trading Company
inquiry1.high quality: quality is life. quality is the most important element for all goods. we have a lab doing research in wuhan china. hplc and nmr is available if needed. 2.reasonable price: we provide high quality products wi
Cas:53-16-7
Min.Order:10 Gram
Negotiable
Type:Lab/Research institutions
inquiryConditions | Yield |
---|---|
With Cp*Ir(6,6'-dionato-2,2'-bipyridine)(H2O) In tert-butyl alcohol at 130℃; for 20h; | 100% |
With Cp*Ir(6,6'-dionato-2,2'-bipyridine)(H2O) In tert-butyl alcohol for 20h; Reflux; | 100% |
With polystyrene-supported(cathecholato) oxoRe cat. act by iPrOH; dimethyl sulfoxide In toluene for 4h; Heating; Dean-Stark apparatus; | 98% |
Conditions | Yield |
---|---|
100% |
Conditions | Yield |
---|---|
With methanol; zinc | 98% |
With tetrabutyl ammonium fluoride In tetrahydrofuran at 27℃; for 72h; | 94% |
With lipase from Candida cylindracea; octanol In various solvent(s) at 37℃; for 144h; | 90% |
With sodium hydroxide In methanol; water for 0.25h; |
17-oxo-1,3,5(10)-estratrien-3-yl 2-(trimethylsilyl)ethyl butanedioate
Estrone
Conditions | Yield |
---|---|
With tetrabutyl ammonium fluoride In tetrahydrofuran at 27℃; for 24h; | 97% |
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In diethyl ether Ambient temperature; | 96% |
With toluene-4-sulfonic acid In diethyl ether Ambient temperature; Yield given; | |
With acetic acid In chloroform-d1 |
C23H34O3Si
Estrone
Conditions | Yield |
---|---|
With hydrogenchloride In tetrahydrofuran; water at 20℃; for 2h; | 95% |
Conditions | Yield |
---|---|
With aluminium trichloride; sodium iodide In dichloromethane; acetonitrile for 5.5h; Heating; | 93% |
Stage #1: estrone 3-methyl ether With aluminum (III) chloride; sodium iodide In dichloromethane at 0 - 20℃; Inert atmosphere; Stage #2: With hydrogenchloride; water In dichloromethane Inert atmosphere; | 92% |
With boron tribromide at -30 - 0℃; for 2.5h; | 88% |
19-acetoxyandrosta-1,4-diene-3,17-dione
Estrone
Conditions | Yield |
---|---|
With sodium hydroxide In methanol at 20℃; for 0.05h; | 90% |
With sodium hydroxide In methanol at 20℃; for 2h; | 76% |
With potassium hydroxide In methanol at 20℃; for 2h; | 50.1% |
Estrone
Conditions | Yield |
---|---|
With diethylamine In ethanol; dichloromethane at 55 - 60℃; for 8h; Hydrolysis; | 90% |
3-<2,3,5,6-tetrafluoro-4-(trifluoromethyl)phenoxy>estra-1,3,5(10)-trien-17-one
Estrone
Conditions | Yield |
---|---|
With sodium methylate In N,N-dimethyl-formamide at 20℃; for 2h; Product distribution; regeneration reactions of the parent compound from different perfluoroaryl derivatives to the alcohols; other educts and products, different times, temperatures and mol ratios of the educts; | 87% |
19-tert-butyldimethylsilyloxy-androsta-1,4-diene-3,17-dione
Estrone
Conditions | Yield |
---|---|
With tetrabutyl ammonium fluoride In tetrahydrofuran at 20℃; for 2h; | 85.9% |
With tetrabutyl ammonium fluoride In tetrahydrofuran at 20℃; for 1h; |
4β,5-epoxy-5β-androstane-3,17,19-trione
A
Estrone
B
4β,5-dihydroxy-5α-androstane-3,17,19-trione 4,19-hemiacetal
Conditions | Yield |
---|---|
With perchloric acid In tetrahydrofuran; water for 72h; | A 3% B 82% |
Estrone
Conditions | Yield |
---|---|
With tetrabutyl ammonium fluoride In tetrahydrofuran at 45℃; for 20h; | 82% |
estradiol
ethylene glycol
A
Estrone
B
(8R,9S,13S,14S)-13-methyl-6,7,8,9,11,12,13,14,15,16-decahydrospiro[cyclopenta[a]phenanthrene-17,2′-[1,3]dioxolan]-3-ol
Conditions | Yield |
---|---|
With dimethyl sulfoxide; [ReOCl3(PPh3)2] In toluene for 5h; Heating; | A 18% B 82% |
Conditions | Yield |
---|---|
With 5%-palladium/activated carbon; hydrogen In tetrahydrofuran; methanol at 40℃; for 12h; | 81% |
With palladium on activated charcoal; hydrogen In methanol at 40℃; for 12h; | 81% |
2α-acetoxy-19-oxoandrost-4-ene-3,17-dione
Estrone
Conditions | Yield |
---|---|
With potassium hydrogencarbonate In methanol; water for 2h; Ambient temperature; further reagents; | 80% |
3,17-dioxo-4β,5-epoxy-5β-androstan-19-oic acid
A
Estrone
B
(8R,9S,13S,14S)-3-Hydroxy-13-methyl-2,3,6,7,8,9,11,12,13,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-4,17-dione
Conditions | Yield |
---|---|
In decalin for 2.5h; Heating; | A 9% B 79% |
Conditions | Yield |
---|---|
With 1-Methyl-4-piperidone; aluminum isopropoxide In toluene for 4h; Heating; | 77% |
Conditions | Yield |
---|---|
With iodine; triethylphosphine In toluene at 120℃; for 10h; Concentration; Solvent; Reagent/catalyst; Temperature; | 72% |
With mineral oil at 530℃; in ein mit Glasperlen beschicktes Rohr; | |
at 325℃; unter vermindertem Druck; | |
at 325℃; |
2,4-dibromo-3-hydroxy-13β-estra-1,3,5(10)-trien-17-one
A
Estrone
B
4-bromo-3-hydroxyestra-1,3,5(10)-trien-17-one
Conditions | Yield |
---|---|
With formic acid; palladium on activated charcoal In N,N-dimethyl-formamide for 1.75h; Heating; | A 20% B 70% |
With formic acid; palladium on activated charcoal In N,N-dimethyl-formamide for 1.75h; Heating; variation in time and temperature; | A 20% B 70% |
With hydrogen; palladium on activated charcoal In ethanol Ambient temperature; Yield given; |
estrone-3′-hemisuccinate
Estrone
Conditions | Yield |
---|---|
With tetrabutyl ammonium fluoride In tetrahydrofuran at 27℃; for 32h; | 66% |
Estrone
Conditions | Yield |
---|---|
With [Rh2(bpy)2(μ-OAc)2(OAc)2]; oxygen; N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide under 760.051 Torr; for 24h; Irradiation; | 63% |
17-oxo-estra-1,3,5(10)-trien-3-yl Se-phenyl selenocarbonate
A
Estrone
Conditions | Yield |
---|---|
With 2,2'-azobis(isobutyronitrile); tri-n-butyl-tin hydride In xylene at 144℃; | A 62% B 18% |
estradiol
Estrone
Conditions | Yield |
---|---|
With 2,6-di-tert-butyl-4-methyl-phenol; aluminum isopropoxide; benzaldehyde In 2-methyltetrahydrofuran at 20℃; for 4h; Oppenauer Oxidation; Inert atmosphere; | 58% |
Conditions | Yield |
---|---|
With hydrogenchloride In methanol; water at 20 - 25℃; for 0.5h; Inert atmosphere; | A 56% B 32% |
3β-Hydroxy-19-norandrosta-1(10),5-dien-17-one
A
Estrone
B
17-Oxo-19-norandrost-1(10),5-dien-3β-yl trifluoroacetate
Conditions | Yield |
---|---|
With triethylamine In dichloromethane; dimethyl sulfoxide at -78℃; | A 53% B 20% |
3β-Hydroxy-19-norandrosta-1(10),5-dien-17-one
trifluoroacetic anhydride
A
Estrone
B
17-Oxo-19-norandrost-1(10),5-dien-3β-yl trifluoroacetate
Conditions | Yield |
---|---|
With triethylamine In dichloromethane; dimethyl sulfoxide at -78℃; | A 53% B 20% |
Conditions | Yield |
---|---|
With acetic acid for 1.33333h; Heating; | A 18% B 50% |
4β,5-epoxy-5β-androstane-3,17,19-trione
A
Estrone
C
4β,5-dihydroxy-5α-androstane-3,17,19-trione 4,19-hemiacetal
Conditions | Yield |
---|---|
With perchloric acid In tetrahydrofuran for 24h; | A 8% B 7% C 17% D 49% |
With perchloric acid In tetrahydrofuran for 24h; Product distribution; reaction in the presence of H2SO4; acid- and base-catalysed reactions of 4β,5β- and 4α,5α-epoxyandrostane-3,17,19-triones; | A 8% B 7% C 17% D 49% |
Conditions | Yield |
---|---|
With pyridine; hydroxylamine hydrochloride In ethanol; water for 6h; Reflux; Inert atmosphere; | 100% |
With pyridine; hydroxylamine hydrochloride In ethanol for 6h; Reflux; | 100% |
With hydroxylamine hydrochloride In pyridine; ethanol | 99% |
Conditions | Yield |
---|---|
With triethylamine; hydrazine In ethanol; water | 100% |
With triethylamine; hydrazine In ethanol for 3h; Reflux; | 96% |
With hydrazine hydrate In ethanol at 45℃; for 2h; | 95% |
With hydrazine | |
With hydrazine In butan-1-ol; diethylene glycol for 1h; Reflux; |
Estrone
pivaloyl chloride
(8R,9S,13S,14S)-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl pivalate
Conditions | Yield |
---|---|
With triethylamine In chloroform | 100% |
With dmap; triethylamine In dichloromethane at 0℃; for 0.3h; Inert atmosphere; | 96% |
With triethylamine In dichloromethane at 0 - 20℃; Inert atmosphere; Sealed tube; | 87% |
3,4-dihydro-2H-pyran
Estrone
3-tetrahydropyranyloxy-1,3,5(10)-estratrien-17-one
Conditions | Yield |
---|---|
With pyridinium p-toluenesulfonate In dichloromethane at 23℃; for 18h; | 100% |
With pyridinium p-toluenesulfonate In dichloromethane at 21℃; for 20h; | 100% |
With pyridinium p-toluenesulfonate In dichloromethane at 23℃; for 18h; | 100% |
Conditions | Yield |
---|---|
With pyridine In dichloromethane at 0 - 20℃; Inert atmosphere; | 100% |
With pyridine In dichloromethane at 0 - 20℃; for 1.5h; Inert atmosphere; | 100% |
With triethylamine In dichloromethane at 0℃; for 1h; | 99% |
Estrone
ethylene glycol
(8R,9S,13S,14S)-13-methyl-6,7,8,9,11,12,13,14,15,16-decahydrospiro[cyclopenta[a]phenanthrene-17,2′-[1,3]dioxolan]-3-ol
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In toluene Heating; | 100% |
With trimethyl orthoformate In toluene; acetonitrile at 20℃; | 99% |
With toluene-4-sulfonic acid In benzene for 13h; Heating; | 94% |
Estrone
methanesulfonyl chloride
(8R,9S,13S,14S)-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl methanesulfonate
Conditions | Yield |
---|---|
With pyridine Ambient temperature; | 100% |
In dichloromethane Heating; | 92% |
With triethylamine In dichloromethane for 3h; | 91% |
With triethylamine In dichloromethane 0 deg C to r.t., 24 h; | 88% |
With pyridine at 0 - 25℃; |
Estrone
D-camphor-10-sulfonyl chloride
Conditions | Yield |
---|---|
With pyridine Ambient temperature; | 100% |
Estrone
aminooxyacetic acid
2-({(E)-[(8R,9S,13S,14S)-3-hydroxy-13-methyl-7,8,9,11,12,13,15,16-octahydro-6H-cyclopenta[a]phenanthren-17(14H)-ylidene]amino}oxy)acetic acid
Conditions | Yield |
---|---|
With pyridine at 20℃; for 17h; | 100% |
triisopropylsilyl chloride
Estrone
Conditions | Yield |
---|---|
With 1H-imidazole In N,N-dimethyl-formamide Inert atmosphere; | 100% |
Estrone
ethylene dibromide
3-(2’-bromoethoxy)estra-1,3,5(10)-trien-17-one
Conditions | Yield |
---|---|
With sodium hydroxide In tetrahydrofuran; water Reflux; | 100% |
With sodium hydroxide In tetrahydrofuran; water Reflux; | 84% |
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 20 - 30℃; | 100% |
With pyridine at 25℃; | 95% |
With pyridine for 2h; Inert atmosphere; | 94% |
Conditions | Yield |
---|---|
With tetra-(n-butyl)ammonium iodide; potassium carbonate In acetone for 48h; Schlenk technique; Inert atmosphere; Reflux; | 100% |
With tetra-(n-butyl)ammonium iodide; potassium carbonate In acetone for 48h; Schlenk technique; Inert atmosphere; Reflux; | 100% |
Estrone
3-(2'-Methoxyethoxy)-1,3,5(10)-estratrien-17-one
Conditions | Yield |
---|---|
With caesium carbonate In acetonitrile | 99.4% |
Conditions | Yield |
---|---|
With pyridine In dichloromethane at 20℃; for 0.25h; Inert atmosphere; | 99% |
With triethylamine | 91% |
With dmap; triethylamine In dichloromethane at 0 - 20℃; for 6h; Inert atmosphere; | 82% |
Estrone
16,16-di-deuterium-estra-1,3,5(10)-triene-17-one
Conditions | Yield |
---|---|
With [D]-sodium hydroxide In deuteromethanol; water-d2 for 24h; Reflux; Inert atmosphere; | 99% |
With deuteriated sodium hydroxide In deuteromethanol; water-d2 at 60℃; for 24h; | |
With deuteromethanol; sodium methylate |
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In benzene Heating; | 99% |
With toluene-4-sulfonic acid In toluene Reflux; |
Estrone
tert-butyldimethylsilyl chloride
3-(O-tert-butyl(dimethyl)silyl)estrone
Conditions | Yield |
---|---|
With 1H-imidazole In N,N-dimethyl-formamide at 20℃; for 1h; | 99% |
With 1H-imidazole | 99% |
With 1H-imidazole In DMF (N,N-dimethyl-formamide) at 20℃; | 98% |
Conditions | Yield |
---|---|
With tetra-(n-butyl)ammonium iodide; sodium hydroxide In dichloromethane at 70℃; for 3h; | 99% |
With potassium carbonate In N,N-dimethyl-formamide Heating; | 98% |
With potassium carbonate In N,N-dimethyl-formamide 1) reflux, 2 h, 2) r.t., 5 d; | 97% |
Conditions | Yield |
---|---|
With sodium hydroxide; tetra(n-butyl)ammonium hydrogensulfate In dichloromethane for 24h; Heating; | 99% |
With sodium hydroxide; tetra(n-butyl)ammonium hydrogensulfate In dichloromethane for 24h; Heating; | 99% |
With sodium hydroxide; tetra(n-butyl)ammonium hydrogensulfate In dichloromethane; water for 24h; Heating / reflux; | 99% |
Estrone
(aminooxy)acetic acid hemihydrochloride
2-({(E)-[(8R,9S,13S,14S)-3-hydroxy-13-methyl-7,8,9,11,12,13,15,16-octahydro-6H-cyclopenta[a]phenanthren-17(14H)-ylidene]amino}oxy)acetic acid
Conditions | Yield |
---|---|
With pyridine at 23℃; for 16h; | 99% |
Conditions | Yield |
---|---|
With iron(III) trifluoromethanesulfonate at 20℃; for 5h; Schlenk technique; | 99% |
With iodine at 85 - 90℃; for 0.0833333h; | 96% |
With iodine at 90℃; |
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide | 99% |
In tetrahydrofuran; dichloromethane; N,N-dimethyl-formamide | 94% |
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide | A 99% B n/a |
Estrone
C18H19(2)H3O2
Conditions | Yield |
---|---|
With hydrogen; water-d2; palladium on activated charcoal at 20℃; for 72h; | 99% |
Conditions | Yield |
---|---|
Stage #1: Estrone; di-tert-butylchlorosilane With 1H-imidazole In tetrahydrofuran at 20℃; Inert atmosphere; Stage #2: With N-Bromosuccinimide In dichloromethane Stage #3: With water; sodium hydroxide In dichloromethane; N,N-dimethyl-formamide at 20℃; | 99% |
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide at 130℃; for 16h; | 99% |
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