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inquiry1,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
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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
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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
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inquirySupply top quality products with a reasonable price Application:api
2'-CHLORO-4',5'-DIFLUOROACETOPHENONEAppearance: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
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inquiry121872-94-4 Application:intermediate
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inquiryStock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai
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inquiryKnown for its best quality and competitve price, this chemicals we offered is widely appreciated by our customers.Appearance:White powder Storage:keep sealed and keep from direct light Package:According client's requirements Application:pharmaceutica
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inquiry1.Professional synthesis laboratory and production base. 2.Strong synthesis team and service team. 3.Professional data management system. 4.We provide the professional test date and product information ,ex. HNMR ,CNMR,FNMR, HPLC/G
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Min.Order:10 Milligram
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inquiry4-chloro-1,2-difluorobenzene
acetyl chloride
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
aluminium trichloride | 82% |
With aluminium trichloride Acylation; | 80% |
With aluminium trichloride at 60℃; for 9h; | 75% |
2-fluoro-5-chloronitrobenzene
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: H2 / 5 percent Pt/C / 1,2-dimethoxy-ethane / 24 h / 2585.74 Torr 2: BF3*Et2O; t-BuONO / 1,2-dimethoxy-ethane / 1 h / -5 °C 3: 49 percent / 0.5 h / 170 °C 4: 80 percent / AlCl3 View Scheme |
5-chloro-2-fluoroaniline
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: BF3*Et2O; t-BuONO / 1,2-dimethoxy-ethane / 1 h / -5 °C 2: 49 percent / 0.5 h / 170 °C 3: 80 percent / AlCl3 View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 52 percent / KF; 18-crown-6 / tetrahydrothiophene 1,1-dioxide / 32 h / 180 °C 2: H2 / 5 percent Pt/C / 1,2-dimethoxy-ethane / 24 h / 2585.74 Torr 3: BF3*Et2O; t-BuONO / 1,2-dimethoxy-ethane / 1 h / -5 °C 4: 49 percent / 0.5 h / 170 °C 5: 80 percent / AlCl3 View Scheme |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 49 percent / 0.5 h / 170 °C 2: 80 percent / AlCl3 View Scheme |
ortho-difluorobenzene
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 90 percent / FeCl3, Cl2 / 3 h / 50 °C 2: 75 percent / AlCl3 / 9 h / 60 °C View Scheme |
carbonic acid dimethyl ester
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Stage #1: carbonic acid dimethyl ester With sodium hydride In tetrahydrofuran for 0.0833333h; Reflux; Stage #2: 2'-chloro-4',5'-difluoroacetophenone In tetrahydrofuran for 10h; Claisen Condensation; Reflux; | 96% |
2'-chloro-4',5'-difluoroacetophenone
2-chloro-4,5-difluorobenzoic acid
Conditions | Yield |
---|---|
With sodium hypochlorite Oxidation; | 90% |
With hydrogenchloride; sodium hypochlorite In dichloromethane | 85.1% |
With hydrogenchloride; sodium hypochlorite In dichloromethane | 85.1% |
With sodium hypochlorite for 6h; Heating; | 80% |
With hydrogenchloride; sodium hydroxide; sodium hypobromide; bromine; sodium hydrogensulfite In 1,4-dioxane; dichloromethane; water |
ethyl cyanoformate
2'-chloro-4',5'-difluoroacetophenone
2-chloro-4,5-difluoro-β-oxobenzenepropanoic acid ethyl ester
Conditions | Yield |
---|---|
With hydrogenchloride; n-butyllithium; diisopropylamine In tetrahydrofuran; hexane | 658 mg (61%) |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: sodium hydride / tetrahydrofuran / 0.08 h / Reflux 1.2: 10 h / Reflux 2.1: CoCl2(pyridine)2 / neat (no solvent) / 24 h / 110 °C / Inert atmosphere View Scheme |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1.1: sodium hydride / tetrahydrofuran / 0.08 h / Reflux 1.2: 10 h / Reflux 2.1: CoCl2(pyridine)2 / neat (no solvent) / 24 h / 110 °C / Inert atmosphere 3.1: dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; 1,1'-bis-(diphenylphosphino)ferrocene; potassium acetate / dichloromethane; tetrahydrofuran / 48 h / 105 °C / Sealed tube; Inert atmosphere View Scheme |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1.1: sodium hydride / tetrahydrofuran / 0.08 h / Reflux 1.2: 10 h / Reflux 2.1: CoCl2(pyridine)2 / neat (no solvent) / 24 h / 110 °C / Inert atmosphere 3.1: dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; 1,1'-bis-(diphenylphosphino)ferrocene; potassium acetate / dichloromethane; tetrahydrofuran / 48 h / 105 °C / Sealed tube; Inert atmosphere 4.1: trichlorophosphate / 0.75 h / 0 °C / Inert atmosphere 4.2: 20.5 h / 0 - 20 °C / Inert atmosphere View Scheme |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
With selenium(IV) oxide In 1,4-dioxane; water for 4h; Reflux; |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: selenium(IV) oxide / 1,4-dioxane; water / 4 h / Reflux 2: palladium 10% on activated carbon / acetic acid / 3 h / Reflux View Scheme |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: selenium(IV) oxide / 1,4-dioxane; water / 4 h / Reflux 2: palladium 10% on activated carbon / acetic acid / 3 h / Reflux 3: 220 °C View Scheme |
Conditions | Yield |
---|---|
With magnesium sulfate In dichloromethane at 20℃; |
2'-chloro-4',5'-difluoroacetophenone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: magnesium sulfate / dichloromethane / 20 °C 2: pyridine / tetrahydrofuran / 0 - 20 °C View Scheme |
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