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inquirymethyl 6-fluoro-3,4-dihydro-2H-chromene-2-carboxylate CAS:874649-82-8 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specia
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inquiryHigh Quality Best price Fast Delivery Good Service Welcome to Henan Tianfu Chemical Co., Ltd. website. Our company engages in Sodium Tripolyphosphate (STPP) and Sodium Hexametabphosphate (SHMP) production; developm
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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
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inquiryhigh purity,in stock Package:25kg/drum,or as per customers'demand Application:API,or Intermediates,fine chemicals Transportation:air,sea,courier
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inquiryAnsciep 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
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inquiryMethyl 6-fluoro-3,4-dihydro-2H-chromene-2-carboxylate/High quality/Best price Application:Methyl 6-fluoro-3,4-dihydro-2H-chromene-2-carboxylate/High quality/Best price
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inquiryAppearance:solid or liquid Storage:sealed in cool and dry place Package:As customer's requested Application:Pharma Intermediate Transportation:by courier/air/sea Port:Any port in China
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inquiryXiamen Luyunjia Trading Co.,Ltd Package:1kg/bag; 727kg/drum, or as customer's request. Application:Xiamen Luyunjia Trading Co.,Ltd Transportation:DHL, EMS, FedEx, TNT, AIR, SEA Port:Beijing,Shanghai,Guangzhou ,China main port
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inquirySupply top quality products with a reasonable price Application:api
2H-1-Benzopyran-2-carboxylicacid, 6-fluoro-3,4-dihydro-, methyl ester cas 874649-82-8Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by exp
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inquiryfactory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
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inquiryMethyl 6-fluoro-3,4-dihydro-2H-chromene-2-carboxylate/High quality/Best priceAppearance:detailed see specifications Storage:Store in dry, dark and ventilated place Package:according to the clients requirement Application:Aromatics;Heterocycles;Interm
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inquiry6-fluoro-4-oxo-4H-1-benzopyran-2-carboxylic acid
methanesulfonic acid
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
With hydrogen; 5%-palladium/activated carbon In tetrahydrofuran at 45 - 55℃; under 3000.3 Torr; | 100% |
6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylic acid
methanol
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
With sulfuric acid at 25 - 30℃; | 98% |
With sulfuric acid at 30℃; Reflux; | 97% |
Stage #1: 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylic acid; methanol With sulfuric acid at 20 - 60℃; for 3.5h; Stage #2: With water; sodium hydrogencarbonate In methanol | 87.9% |
With sulfuric acid at 65 - 70℃; for 8h; Fischer–Speier Esterification; | 85% |
1-(5-fluoro-2-hydroxyphenyl)ethan-1-one
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: sodium methylate; methanol / tetrahydrofuran / 5 - 25 °C 1.2: 5 - 15 °C 1.3: Reflux 2.1: hydrogen / 5%-palladium/activated carbon / tetrahydrofuran / 45 - 55 °C / 3000.3 Torr View Scheme | |
Multi-step reaction with 4 steps 1: sodium methylate / methanol / 65 - 70 °C 2: hydrogenchloride / water / 85 - 90 °C 3: hydrogen; palladium on activated charcoal; acetic acid / 75 - 80 °C / Inert atmosphere; Autoclave 4: sulfuric acid / 8 h / 65 - 70 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: aluminum (III) chloride / dichloromethane / 0 - 20 °C 2: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran / 1 h / 0 °C 3: 5%-palladium/activated carbon; hydrogenchloride; hydrogen / methanol / 5 h / 20 °C / 760.05 Torr View Scheme |
methyl 6-fluoro-4-oxo-3,4-dihydro-2H-chroman-2-carboxylate
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
With hydrogenchloride; 5%-palladium/activated carbon; hydrogen In methanol at 20℃; under 760.051 Torr; for 5h; |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran / 1 h / 0 °C 2: 5%-palladium/activated carbon; hydrogenchloride; hydrogen / methanol / 5 h / 20 °C / 760.05 Torr View Scheme |
4-Fluorophenol
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1: 45 - 50 °C 2: aluminum (III) chloride; hydrogenchloride / water / 140 - 145 °C 3: sodium methylate / methanol / 65 - 70 °C 4: hydrogenchloride / water / 85 - 90 °C 5: hydrogen; palladium on activated charcoal; acetic acid / 75 - 80 °C / Inert atmosphere; Autoclave 6: sulfuric acid / 8 h / 65 - 70 °C View Scheme |
4-fluorophenyl acetate
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: aluminum (III) chloride; hydrogenchloride / water / 140 - 145 °C 2: sodium methylate / methanol / 65 - 70 °C 3: hydrogenchloride / water / 85 - 90 °C 4: hydrogen; palladium on activated charcoal; acetic acid / 75 - 80 °C / Inert atmosphere; Autoclave 5: sulfuric acid / 8 h / 65 - 70 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: hydrogenchloride / water / 85 - 90 °C 2: hydrogen; palladium on activated charcoal; acetic acid / 75 - 80 °C / Inert atmosphere; Autoclave 3: sulfuric acid / 8 h / 65 - 70 °C View Scheme |
6-fluoro-4-oxo-4H-1-benzopyran-2-carboxylic acid
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrogen; palladium on activated charcoal; acetic acid / 75 - 80 °C / Inert atmosphere; Autoclave 2: sulfuric acid / 8 h / 65 - 70 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxaldehyde
Conditions | Yield |
---|---|
With morpholine; sodium bis(2-methoxyethoxy)aluminium dihydride In toluene at -10℃; for 2h; Reagent/catalyst; Inert atmosphere; | 98% |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
With hydrazine hydrate In ethanol Reflux; | 91% |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
dimethylsulfoxonium-2-(6-fluoro-3,4-dihydro-2H-chromen-2-yl)-2-oxoethylide
Conditions | Yield |
---|---|
Stage #1: trimethylsulfoxonium iodide With potassium tert-butylate In tetrahydrofuran at 25 - 70℃; for 2 - 2.16667h; Protected from light; Stage #2: (-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate In tetrahydrofuran at 20℃; for 3.5 - 19h; Product distribution / selectivity; | 48% |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
With nitric acid |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
6-fluoro-3,4-dihydro-2-oxiranyl-2H-1-benzopyran
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1.1: n-butyllithium / hexane; tetrahydrofuran / -85 - -75 °C 1.2: -80 - 0 °C 2.1: ethanol; sodium tetrahydroborate / 2 h / 0 °C / Inert atmosphere 3.1: sodium hydroxide / isopropyl alcohol; water / 1.5 h / 0 °C / Inert atmosphere View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
2-chloro-1-(6-fluoro-3,4-dihydro-2H-1-benzopyran-2yl)ethanol
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: n-butyllithium / hexane; tetrahydrofuran / -85 - -75 °C 1.2: -80 - 0 °C 2.1: ethanol; sodium tetrahydroborate / 2 h / 0 °C / Inert atmosphere View Scheme |
Conditions | Yield |
---|---|
Stage #1: (-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate; chlorobromomethane With n-butyllithium In tetrahydrofuran; hexane at -85 - -75℃; Stage #2: With borane In tetrahydrofuran; hexane at -80 - -70℃; Stage #3: With water; sodium hydroxide In tetrahydrofuran; hexane for 2h; Reflux; |
chlorobromomethane
2-chloro-1-(6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl)ethan-1-one
Conditions | Yield |
---|---|
Stage #1: (-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate; chlorobromomethane With n-butyllithium In tetrahydrofuran; hexane at -85 - -75℃; Stage #2: With acetic acid In tetrahydrofuran; hexane; water at -80 - 0℃; |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
A
6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxaldehyde
B
(6-fluoro-3,4-dihydro-2H-chromene-2-yl)methanol
Conditions | Yield |
---|---|
With sodium bis(2-methoxyethoxy)aluminium dihydride In dichloromethane; isopropyl alcohol; toluene at -78 - -73℃; Concentration; Solvent; Inert atmosphere; |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride / dichloromethane; toluene; isopropyl alcohol / -78 - -73 °C / Inert atmosphere 2: potassium tert-butylate / dimethyl sulfoxide / 25 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylic acid
Conditions | Yield |
---|---|
With lithium hydroxide In tetrahydrofuran; methanol; water at 20℃; for 2h; |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride; morpholine / toluene / 2 h / -10 °C / Inert atmosphere 2: trimethylsulfoxonium iodide; sodium methylate / dimethyl sulfoxide; dichloromethane / 2 h / 10 - 15 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride; morpholine / toluene / 2 h / -10 °C / Inert atmosphere 2: trimethylsulfoxonium iodide; sodium methylate / dimethyl sulfoxide; dichloromethane / 2 h / 10 - 15 °C 3: water / 6 h / 10 - 30 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride; morpholine / toluene / 2 h / -10 °C / Inert atmosphere 2: trimethylsulfoxonium iodide; sodium methylate / dimethyl sulfoxide; dichloromethane / 2 h / 10 - 15 °C 3: methanol / 15 h / 30 °C / Reflux View Scheme | |
Multi-step reaction with 4 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride; morpholine / toluene / 2 h / -10 °C / Inert atmosphere 2: trimethylsulfoxonium iodide; sodium methylate / dimethyl sulfoxide; dichloromethane / 2 h / 10 - 15 °C 3: water / 6 h / 10 - 30 °C 4: methanol / 15 h / 30 °C / Reflux View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride; morpholine / toluene / 2 h / -10 °C / Inert atmosphere 2: trimethylsulfoxonium iodide; sodium methylate / dimethyl sulfoxide; dichloromethane / 2 h / 10 - 15 °C 3: methanol / 15 h / 30 °C / Reflux 4: palladium on activated charcoal; hydrogen / acetic acid / 30 - 35 °C View Scheme | |
Multi-step reaction with 5 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride; morpholine / toluene / 2 h / -10 °C / Inert atmosphere 2: trimethylsulfoxonium iodide; sodium methylate / dimethyl sulfoxide; dichloromethane / 2 h / 10 - 15 °C 3: water / 6 h / 10 - 30 °C 4: methanol / 15 h / 30 °C / Reflux 5: palladium on activated charcoal; hydrogen / acetic acid / 30 - 35 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: sodium bis(2-methoxyethoxy)aluminium dihydride; morpholine / toluene / 2 h / -10 °C / Inert atmosphere 2: trimethylsulfoxonium iodide; sodium methylate / dimethyl sulfoxide; dichloromethane / 2 h / 10 - 15 °C View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrazine hydrate / ethanol / Reflux 2: trichlorophosphate / Reflux View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrazine hydrate / ethanol / Reflux 2: trichlorophosphate / Reflux View Scheme |
(-)-(R)-methyl 6-fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrazine hydrate / ethanol / Reflux 2: trichlorophosphate / Reflux View Scheme |
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