CAS: 1335-40-6; Ethyl2-Furoate

专利信息

专利号:US-5278337-A
优先权日:1992-10-14
标 题:Enantiomeric resolution of aryl-substituted aliphatic carboxylic acids
发明人：MANIMARAN THANIKAVELU; STAHLY G PATRICK; HERNDON JR R CARL
权利人:ETHYL CORP
摘要:A process for obtaining a substantially pure enantiomer of an aryl-substituted aliphatic carboxylic acid is described. The process utilizes first an enantiomerically enriched mixture the of aryl-substituted aliphatic carboxylic acid obtained from kinetic resolution, diastereomeric crystallization or asymmetric synthesis processes. This enriched mixture is reacted with a base producing a salt that has the following properties: n 1) has at least one eutectic point; n 2) a composition that is not at the eutectic point; and n 3) a eutectic composition that is closer to the racemic composition than is the eutectic composition of said aryl-substituted carboxylic acid. n Substantially pure, enantiomeric salt is separated, leaving a mother liquor comprising the solvent and aryl-substituted aliphatic carboxylic acid enriched in the other enantiomer.

专利号:WO-2015072870-A1
优先权日:2013-11-18
标题:The process for obtaining 5-(chloromethyl)furfural and its ethers from algal biomass
发明人：BOMBOÅž, Dorin; BEDÅ?, Dávid; CRUCEAN AUGUSTIN CONSTANTIN; STEPAN EMIL; TRIFOI ANCUTA-ROXANA
权利人:SC INST DE CERCETARI PRODUSE AUX E ORGANICE SA
摘要:The present invention relates to an improvement of the technologies for obtaining halide derivates of furfurals, 5 (chloromethyl) furfural (CMF), by dehydration of the soluble polysaccharides from the de-oiled algal biomass through 5-(hydroxymethyl) furfural (HMF), possibly with small amounts of levulinic acid (LA). The reaction is acid catalyzed in a biphasic mixture of toluene-water in the presence of dispersion substances based of water-soluble salts in an aqueous medium of lower oligomers of the product of β-naphthalenesulfonic acid condensation with formaldehyde. Furthermore by treating with activated natural Ca-bentonite with specific characteristics with a role of inhibition of the polymerization reaction. The synthesis of these components is carried out at temperatures ranging from 60 to 75°C, with high yields between 90- 95%.

专利号:CN-112300020-A
优先权日:2019-11-28
标题:A kind of method for vanadium-catalyzed synthesis of amide derivatives

专利号:US-2919289-A
优先权日:1955-06-25
标题 :Method of synthesis of dialkyl alphaketoglutarate from alkyl 2, 5-dialkoxy-2, 5-dihydro-2-furoate
发明人：MASUO MURAKAMI; SABURO SENOH
权利人:MASUO MURAKAMI; SABURO SENOH

专利号:US-5248813-A
优先权日:1992-10-14
标题:Enantiomeric resolution
发明人：MANIMARAN THANIKAVELU; STAHLY G PATRICK; HERNDON JR R CARL
权利人:ETHYL CORP
摘要:A process for obtaining a substantially pure enantiomer of an aryl-substituted aliphatic carboxylic acid is described. The process utilizes first an enantiomerically enriched mixture the of aryl-substituted aliphatic carboxylic acid obtained from kinetic resolution, diastereomeric crystallization or asymmetric synthesis processes. This enriched mixture is reacted with a base producing a salt that has the following properties: n (1) has at least one eutectic point; n (2) a composition that is not at the eutectic point; and n (3) a eutectic composition that is closer to the racemic composition than is the eutectic composition of said aryl-substituted carboxylic acid. n Substantially pure, enantiomeric salt is separated, leaving a mother liquor comprising the solvent and aryl-substituted aliphatic carboxylic acid enriched in the other enantiomer.

专利号:CN-112300020-B
优先权日:2019-11-28
标题:A kind of method of vanadium catalysis synthesis amide derivative