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:496-16-2
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inquiryItems Standard Result Appearance Colorless or yellowish liquid Conform Assay(GC) 99.00%min
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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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Cangzhou Enke Pharma Tech Co.,ltd. is located in Cangzhou City, Hebei province ,where is a famous petroleum chemical industry city in China. Enke Pharma a high-tech enterprise ,and we are dedicated to developing and manufacturing new api, intermedi
2,3-Dihydrobenzofuran CAS 496-16-2 Coumaran CAS no 496-16-2 2,3-Dihydro-1-benzofuran 2,3-Dihydrobenzofuran CAS 496-16-2 2,3-Dihydro-1-benzofuran IN Stock CAS 496-16-2 2,3-Dihydro-1-benzofuran 2,3-Dihydrobenzofuran COA TDS price MSDS Benzamid
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inquiryTIANFUCHEM--496-16-2--2,3-Dihydrobenzofuran factory price 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 we had established stable business r
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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
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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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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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inquiryAppearance:Light yellowish liquid Storage:ln stock Package:25kg/Barrel Application:Chemicals Transportation:Express/Sea/Air Port:Any port of China
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inquiryAdvantages: 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 serv
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inquiryPacking: According to customer requirements Delivery time: In stock or depands Port of shipment: Ningbo/Shanghai/Qingdao OEM/ODM:Welcome Sample:We can offer our existing samples at once Appearance:Clear colorless liquid Storage:Refer to COA / M
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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 prese
Cas:496-16-2
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inquiry2,3-Dihydrobenzofuran CAS:496-16-2 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 inter
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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
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Cas:496-16-2
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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
2,3-Dihydrobenzofuran Product Name: 2,3-Dihydrobenzofuran Synonyms: 2,3-Dihydro-1-benzofuran;2,3-dihydro-benzofura;Coumaran (2,3-dihydrobenzofuran);Dihydrobenzofuran;Dihydrocoumarone;Kumaran;2,3-DIHYDROBENZO[B]FURAN;2,3-DIHYDROBENZOFURAN CAS:
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inquiryBest quality & Attractive price & Professional service; Trial & Pilot & Commercial Hisunny Chemical is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality intermediates, specia
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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
Cas:496-16-2
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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
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Massive Chemical is certified with ISO9001 and ISO14001 manufacturer for this product. We will offer all documents as requirement for the materials which includes, Certificate of Analysis, Material Safety Data Sheet, and Method of Analysis and
Cas:496-16-2
Min.Order:1 Gram
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inquiryConditions | Yield |
---|---|
With methanol; palladium diacetate; 4,4,5,5-tetramethyl-[1,3,2]-dioxaboralane In dichloromethane at 25℃; for 12h; Sealed tube; Inert atmosphere; chemoselective reaction; | 99% |
With hydrogen In methanol at 80 - 90℃; under 750.075 - 22502.3 Torr; Reagent/catalyst; Autoclave; | 97.8% |
With ethanol; (BQ‑NCOP)IrHCl; sodium t-butanolate at 60℃; for 5h; Inert atmosphere; Schlenk technique; Sealed tube; chemoselective reaction; | 96% |
2-(2-iodophenyl)ethan-1-ol
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With copper(l) iodide; sodium t-butanolate In N,N-dimethyl-formamide at 20℃; for 0.0833333h; Schlenk technique; Inert atmosphere; Molecular sieve; | 99% |
Multi-step reaction with 3 steps 1.1: triphenylphosphine; iodine; 1H-imidazole / tetrahydrofuran / 2 h / 0 °C / Inert atmosphere; Darkness 2.1: silver(l) oxide / N,N-dimethyl-formamide / 0 °C / Inert atmosphere 2.2: 0 - 20 °C / Inert atmosphere 3.1: n-butyllithium / tetrahydrofuran; hexane / 1 h / -78 - 20 °C / Inert atmosphere View Scheme |
2-(2-chlorophenyl)-1-ethanol
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With Ru/Al2O3; potassium carbonate In N,N-dimethyl-formamide at 60℃; for 1.5h; Temperature; Microwave irradiation; | 96.2% |
With copper(l) iodide; 8-quinolinol; caesium carbonate In 5,5-dimethyl-1,3-cyclohexadiene at 20 - 120℃; Inert atmosphere; | 82% |
With racemic-2-(di-tert-butylphosphino)-1,1′-binaphthyl; palladium diacetate; caesium carbonate In toluene at 50℃; for 23h; | 72% |
With racemic-2-(di-tert-butylphosphino)-1,1′-binaphthyl; palladium diacetate; caesium carbonate In toluene at 50℃; for 23h; | 72% |
With potassium phosphate; C22H28NP; palladium diacetate In toluene at 60℃; for 20h; | 51 % Chromat. |
Conditions | Yield |
---|---|
With copper(l) iodide; lithium tert-butoxide In 1,4-dioxane at 100℃; | 96% |
With racemic-2-(di-tert-butylphosphino)-1,1′-binaphthyl; palladium diacetate; caesium carbonate In toluene at 50℃; for 26h; | 87% |
With racemic-2-(di-tert-butylphosphino)-1,1′-binaphthyl; palladium diacetate; caesium carbonate In toluene at 50℃; for 26h; | 87% |
Conditions | Yield |
---|---|
With sodium methylate In carbonic acid dimethyl ester; acetonitrile for 2h; Inert atmosphere; | 95% |
With 1,8-diazabicyclo[5.4.0]undec-7-ene; carbonic acid dimethyl ester at 90℃; for 8h; Reagent/catalyst; Time; | 93% |
Stage #1: 2-(2-hydroxyphenyl)ethanol With sodium hydride In mineral oil at 20℃; for 0.166667h; Inert atmosphere; Stage #2: With trimethyl phosphite In mineral oil at 20℃; for 24h; Inert atmosphere; | 90% |
1-benzofurane
1,4,4a,9a-tetrahydro-fluorene
A
2,3-Dihydrobenzofuran
B
9H-fluorene
Conditions | Yield |
---|---|
palladium on activated carbon at 250℃; for 2h; | A 92% B 95% |
1-benzofurane
1,2,3,4-tetrahydro-9H-fluorene
A
2,3-Dihydrobenzofuran
B
9H-fluorene
Conditions | Yield |
---|---|
A 92% B n/a |
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
Stage #1: 1-iodo-2-(2-iodo-ethoxy)-benzene With isopropylmagnesium chloride In tetrahydrofuran at -30℃; for 1h; Stage #2: In tetrahydrofuran at 25℃; for 2h; Stage #3: In tetrahydrofuran | 87% |
2-(2-Bromoethyl)phenol
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 3h; Heating; | 86% |
With sodium hydroxide; benzene | |
With water |
2-(2-bromophenoxy)ethyl 4-methylbenzenesulfonate
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With copper(l) iodide; lithium methanolate; magnesium In tetrahydrofuran at 0℃; for 24h; Inert atmosphere; Schlenk technique; | 85% |
2-(2-hydroxyphenyl)ethanol
Vilsmeier reagent
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With triethylamine In dichloromethane Ambient temperature; | 80% |
1-(2-bromoethoxy)-2-iodobenzene
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
Stage #1: 1-(2-bromoethoxy)-2-iodobenzene With isopropylmagnesium chloride In tetrahydrofuran at -30℃; for 1h; Stage #2: In tetrahydrofuran at 25℃; for 2h; Stage #3: In tetrahydrofuran | 79% |
2-bromophenyl 2-chloroethyl ether
A
2,3-Dihydrobenzofuran
B
2-hydroxybromobenzene
C
phenol
Conditions | Yield |
---|---|
With magnesium; ethylene dibromide In tetrahydrofuran | A 76% B n/a C n/a |
5-methyl-1,10-phenanthroline
2-bromophenylethyl alcohol
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With CuI; caesium carbonate In dodecane; toluene | 72% |
1-(2-bromoethoxy)-2-bromobenzene
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With n-butyllithium In tetrahydrofuran; hexane at -100 - -95℃; for 0.5h; | 69% |
With diethyl ether; sodium |
Conditions | Yield |
---|---|
With aluminium(III) triflate; tris(2,4-pentanedionato)ruthenium(III); hydrogen; [2-((diphenylphospino)methyl)-2-methyl-1,3-propanediyl]bis[diphenylphosphine] In tetrahydrofuran at 160℃; under 45603.1 Torr; for 12h; Autoclave; | 65% |
Multi-step reaction with 2 steps 1: Lawesson's reagent / toluene / Heating 2: Raney nickel / diethyl ether / 1.) -15 deg C, 2.) -10 deg C, 2 min View Scheme |
2-(2-iodophenyl)ethyl tert-butyl peroxide
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With n-butyllithium In tetrahydrofuran; hexane at -78 - 20℃; for 1h; Inert atmosphere; | 58% |
2-(2-hydroxyphenyl)ethanol
carbonic acid dimethyl ester
A
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With sodium methylate for 7h; Reflux; Inert atmosphere; | A 55% B 31% |
With sodium methylate at 90℃; for 24h; | A 6% B 21% |
2-aminophenethyl alcohol
A
2,3-Dihydrobenzofuran
B
2-(2-hydroxyphenyl)ethanol
Conditions | Yield |
---|---|
With sulfuric acid; sodium nitrite at 0 - 50℃; for 1h; | A 35% B 50% |
2-methoxyphenethyl alcohol
A
2,3-Dihydrobenzofuran
B
2-(2-Bromoethyl)phenol
Conditions | Yield |
---|---|
With hydrogen bromide; acetic acid | A 36% B 46% |
Conditions | Yield |
---|---|
With 15-crown-5; sodium; isopropyl alcohol In tetrahydrofuran at 0℃; for 0.0833333h; Birch Reduction; chemoselective reaction; | A 42% B 39% |
With ethanol; sodium | |
With ethanol; sodium | |
With 15-crown-5; sodium In tetrahydrofuran; isopropyl alcohol; mineral oil at 0℃; for 0.0833333h; Inert atmosphere; Overall yield = 75 %; Overall yield = 45 mg; |
1-bromo-2-methoxy-3-methylbenzene
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With palladium(0)bis(tricyclohexylphosphine); cesium pivalate In toluene at 140℃; for 16h; Inert atmosphere; Sealed tube; Glovebox; | 40% |
Conditions | Yield |
---|---|
With sodium In methanol; diethyl ether; ammonia for 0.166667h; | A 34% B 36% |
With tetrabutylammonium tetrafluoroborate In tetrahydrofuran; water at 0℃; electrolysis (mercury cathode, platinum flag anode, silver wire reference electrode, constant current 4-32 mA cm-2); Yield given. Yields of byproduct given; |
Conditions | Yield |
---|---|
In cyclohexane for 6h; Ambient temperature; Irradiation; | 36% |
(Trimethylsilyl)(o-methoxyphenyl)methanol
A
1-benzofurane
B
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
In benzene at 600℃; | A 16% B 28% |
[(2-Methoxy-phenyl)-phenylmethanesulfonyl-methylene]-triphenyl-λ5-phosphane
A
2,3-Dihydrobenzofuran
B
(E)-2-methoxystilbene
C
(Z)-1-(2-methoxyphenyl)-2-phenylethene
D
1,1'-(1,2-ethanediyl)bisbenzene
Conditions | Yield |
---|---|
at 600℃; under 0.001 - 0.1 Torr; for 1h; Yields of byproduct given. Title compound not separated from byproducts; | A 7% B n/a C n/a D 11 % Spectr. |
Conditions | Yield |
---|---|
With zinc(II) chloride | |
With manganese(ll) chloride; zinc(II) chloride at 200℃; for 3h; Temperature; |
1-(2-bromoethoxy)-2-chlorobenzene
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With diethyl ether; sodium |
Conditions | Yield |
---|---|
With sulfuric acid; sodium nitrite Erwaermen der Diazoniumsalz-Loesung mit Natiumhydrogencabonat; | |
Multi-step reaction with 2 steps 1: 50 percent / aq. sodium nitrite, conc. sulfuric acid / 1 h / 0 - 50 °C 2: 75 percent / alumina-silica / 1,2-dimethoxy-ethane / 1 h / 250 °C View Scheme |
2,3-Dihydrobenzofuran
5-bromo-2,3-dihydrobenzo[b]furan
Conditions | Yield |
---|---|
With bromine | 100% |
With iron(III) chloride; N-Bromosuccinimide; 1-butyl-3-methylimidazolium trifluoromethanesulfonimide In toluene at 40℃; regioselective reaction; | 98% |
With bromine In dichloromethane for 0.5h; Ambient temperature; | 96% |
2,3-Dihydrobenzofuran
N,N-dimethyl-formamide
2,3-dihydro-benzofuran-5-carbaldehyde
Conditions | Yield |
---|---|
With trichlorophosphate at 70 - 90℃; for 9.5h; | 100% |
With trichlorophosphate at 70 - 90℃; for 9.5h; | 100% |
Stage #1: 2.3-dihydrobenzofuran; N,N-dimethyl-formamide With trichlorophosphate at 30 - 70℃; Stage #2: With water In N,N-dimethyl-formamide at 20℃; for 1h; | 98% |
2,3-Dihydrobenzofuran
2,3-dihydro-benzofuran-5-carbaldehyde
Conditions | Yield |
---|---|
With trichlorophosphate In water; N,N-dimethyl-formamide | 100% |
With trichlorophosphate In water; N,N-dimethyl-formamide | 100% |
With sodium hydrogencarbonate; trichlorophosphate In N,N-dimethyl-formamide | 94% |
Multi-step reaction with 2 steps 1: 100 percent / Br2 2: 98 percent / n-BuLi / tetrahydrofuran; hexane / -78 - 20 °C View Scheme |
2,3-Dihydrobenzofuran
2,3-dihydrobenzofuran-5-sulfonyl chloride
Conditions | Yield |
---|---|
Stage #1: 2.3-dihydrobenzofuran With sulfur trioxide-N,N-dimethylformamide complex In 1,2-dichloro-ethane at 85℃; for 1h; Stage #2: With thionyl chloride In 1,2-dichloro-ethane at 20 - 75℃; for 1h; | 100% |
Stage #1: 2.3-dihydrobenzofuran With sulfur trioxide-N,N-dimethylformamide complex In 1,2-dichloro-ethane at 85℃; for 1h; Stage #2: With thionyl chloride In 1,2-dichloro-ethane at 20 - 75℃; for 1h; | 100% |
In 1,2-dichloro-ethane | 94% |
2,3-Dihydrobenzofuran
acetyl chloride
1-(2,3-dihydrobenzofuran-5-yl)ethanone
Conditions | Yield |
---|---|
aluminum (III) chloride In dichloromethane at -10℃; for 0.5h; | 99% |
With aluminum (III) chloride In dichloromethane at -10℃; for 0.5h; | 99% |
With aluminum (III) chloride In dichloromethane at -10℃; for 3h; | 97% |
2,3-Dihydrobenzofuran
5-iodo-2,3-dihydro-1-benzofuran
Conditions | Yield |
---|---|
With N-iodo-succinimide; silver(I) triflimide In dichloromethane at 36℃; for 1h; Darkness; | 99% |
With indium(III) triflate; N-iodo-succinimide In acetonitrile at 23℃; for 8h; Inert atmosphere; Darkness; | 92% |
With iron(III) chloride; N-iodo-succinimide; 1-butyl-3-methylimidazolium trifluoromethanesulfonimide at 36℃; for 1h; Inert atmosphere; | 91% |
Conditions | Yield |
---|---|
With tris(pentafluorophenyl)borate In dichloromethane at 20℃; for 20h; silylation; | 99% |
With tris(pentafluorophenyl)borate In dichloromethane at 20℃; for 20h; Reduction; dehydrocondensation; | 99% |
2,3-Dihydrobenzofuran
1,2-dichloro-ethane
2,3-dihydrobenzofuran-5-sulfonyl chloride
Conditions | Yield |
---|---|
With thionyl chloride In water | 99% |
Conditions | Yield |
---|---|
Stage #1: 2.3-dihydrobenzofuran; 2-trimethylsilyl ethane sulfonic acid azide In neat (no solvent) at -10℃; for 0.5h; Schlenk technique; Inert atmosphere; Molecular sieve; Stage #2: With C61H40F4N2O3Ru In neat (no solvent) at -10℃; for 2h; Schlenk technique; Inert atmosphere; Molecular sieve; enantioselective reaction; | 99% |
2,3-Dihydrobenzofuran
bis(pinacol)diborane
2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[b]furan
Conditions | Yield |
---|---|
With C25H40O2P2Ru In octane at 150℃; for 12h; Inert atmosphere; | 99% |
2,3-Dihydrobenzofuran
propionyl chloride
1-(2,3-dihydrobenzofuran-5-yl)propan-1-one
Conditions | Yield |
---|---|
Stage #1: propionyl chloride; aluminum (III) chloride In dichloromethane at 0℃; for 0.166667h; Inert atmosphere; Stage #2: 2.3-dihydrobenzofuran In dichloromethane at 0℃; Inert atmosphere; | 98% |
With aluminum (III) chloride In dichloromethane at 0 - 20℃; for 1h; | 80% |
With tin(IV) chloride In benzene at 30℃; for 24h; Friedel-Crafts acylation; | 66% |
With carbon disulfide; aluminium trichloride |
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With sulfur trioxide In nitromethane at 0℃; for 1h; | 98% |
With sulfur trioxide In nitromethane at 0℃; |
2,3-Dihydrobenzofuran
Conditions | Yield |
---|---|
With sulfuric acid at 20℃; for 3600h; other reagent; other solvent; other temp; | 98% |
With sulfur trioxide In nitromethane at 0℃; excess of reagent; |
Conditions | Yield |
---|---|
With (C5H5)Y(CH2C6H4NMe2-o)2; trityl tetrakis(pentafluorophenyl)borate In toluene at 70℃; for 24h; Inert atmosphere; Glovebox; regioselective reaction; | 98% |
2,3-Dihydrobenzofuran
benzoic acid
(2,3-dihydrobenzofuran-5-yl)(phenyl)methanone
Conditions | Yield |
---|---|
With trifluoroacetic acid; trifluoroacetic anhydride at 20℃; for 12h; Friedel-Crafts Acylation; Inert atmosphere; | 98% |
Conditions | Yield |
---|---|
With tetrabutylammonium acetate for 4.5h; Electrolysis; Inert atmosphere; Sealed tube; regioselective reaction; | 97% |
2,3-Dihydrobenzofuran
bis(2,2,2-trichloroethyl) hydrazino-1,2-dicarboxylate
1-(5-dihydrobenzofuranyl)-1,2-hydrazinedicarboxylic acid bis(2,2,2-trichloroethyl) ester
Conditions | Yield |
---|---|
With zinc(II) chloride In dichloromethane at 20℃; | 96.6% |
2,3-Dihydrobenzofuran
5-Chloro-2,3-dihydrobenzo[b]furan
Conditions | Yield |
---|---|
With N-chloro-succinimide; 2,2,6,6-tetramethylpiperidin-1-oxoammonium trifluoromethanesulfonate In chloroform at 25℃; for 12h; Reagent/catalyst; Schlenk technique; | 96% |
With iron(III) chloride; N-chloro-succinimide; 1-butyl-3-methylimidazolium trifluoromethanesulfonimide In tetrahydrofuran at 60℃; for 18h; Inert atmosphere; regioselective reaction; | 86% |
With N-chloro-succinimide; zirconium(IV) chloride In dichloromethane at 20℃; for 12h; | |
With N-chloro-succinimide; zirconium(IV) chloride In dichloromethane at 20℃; for 12h; Conversion of starting material; | |
With N-chloro-succinimide; acetic acid In acetonitrile at 10 - 35℃; for 48h; | 2.28 g |
2,3-Dihydrobenzofuran
acetic anhydride
1-(2,3-dihydrobenzofuran-5-yl)ethanone
Conditions | Yield |
---|---|
With Hβ zeolite (Si:Al 12.5) at 120℃; for 1.5h; | 95% |
With trifluoroacetic acid at 20℃; for 1.5h; Friedel-Crafts Acylation; | 91% |
With zinc(II) chloride at 95 - 105℃; for 10h; | |
With zinc(II) chloride at 95 - 105℃; for 10h; |
Conditions | Yield |
---|---|
With chloro[5,10,15,20-tetrakis(4-dimethylamino-2,3,5,6-tetrafluorophenyl)porphyrinate]iron(III) In 1,2-dichloro-ethane at 120℃; for 12h; Schlenk technique; Inert atmosphere; Molecular sieve; regioselective reaction; | 95% |
2,3-Dihydrobenzofuran
2,3-dihydrobenzofuran-7-sulfonyl chloride
Conditions | Yield |
---|---|
In 1,2-dichloro-ethane | 94% |
2,3-Dihydrobenzofuran
1-(2,3-dihydrobenzofuran-5-yl)ethanone
Conditions | Yield |
---|---|
Stage #1: acetyl chloride With aluminum (III) chloride In dichloromethane at -10℃; for 0.25h; Stage #2: 2.3-dihydrobenzofuran In dichloromethane at -10℃; for 0.5h; Stage #3: With hydrogenchloride In dichloromethane; water at 0℃; for 2h; | 94% |
2,3-Dihydrobenzofuran
5,7-Dibromo-2,3-dihydrobenzofuran
Conditions | Yield |
---|---|
With bromine; sodium thiosulfate In dichloromethane; acetic acid | 93% |
With iodine pentoxide; potassium bromide In water at 20℃; for 23h; regioselective reaction; | 89% |
With bromine; sodium thiosulfate In chloroform | 87% |
Conditions | Yield |
---|---|
Stage #1: 2.3-dihydrobenzofuran; aluminum (III) chloride In toluene at 20 - 30℃; for 0.5h; Stage #2: 5-Chlorovaleroyl chloride In toluene at -5 - 5℃; for 1h; | 92.8% |
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