CAS: 6018-41-3; Methyl 2-Oxo-2H-Pyran-5-Carboxylate

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CAS号500-05-0 阔马酸 | CAS号77-78-1 硫酸二甲酯 | CAS号67-56-1 甲醇 | CAS号186581-53-3 重氮甲烷 | CAS号617-48-1 DL-苹果酸 | CAS号23090-18-8 2-OXO-2H-PYRAN-... | CAS号118481-26-8 methyl 8-methox... | CAS号7664-93-9 硫酸 | CAS号106047-17-0 4-(吡啶-4-基)苯甲酸甲酯 | CAS号37908-98-8 3-氯-4-甲氧基苯甲酸甲酯 | CAS号49742-56-5 4’-甲基[1,1’-联苯]-... | CAS号3609-53-8 对乙酰基苯甲酸乙酯 | CAS号144464-66-4 5-氧代-5,6,7,8-四氢... | CAS号142557-75-3 methyl 4-(4-dec... | CAS号17595-86-7 4-噻吩-2-硼酸甲酯 | CAS号480425-35-2 3-甲氧羰基苯硼酸频哪醇酯 | CAS号171364-80-0 4-甲氧羰基苯硼酸频哪醇酯 | CAS号18069-17-5 2-甲基戊二酸

香豆酸置于五氯化磷体系中,化学反应 1.0H,反应生成 香豆灵酸甲酯
参考文献:Eine Neue Total合成von(+/-)deplanchein
标题:Eine Neue Total合成von(+/-)deplanchein
摘要:该合成的关键步骤是基于甲苯-三羰基铬在二烯7上促进的1.4-H 2加成,其收率接近100%,且具有完全的立体选择性.
DOI:10.1016/s0040-4039(00)81766-9

专利信息

专利号:US-9000209-B2
优先权日:2011-07-22
标题:Method of regioselective synthesis of substituted benzoates
发明人：KRAUS GEORGE A
权利人:KRAUS GEORGE A; UNIV IOWA STATE RES FOUND INC
摘要:A method of synthesis of para-substituted benzoate esters and acids is provided, wherein the para-substituted regioisomer is obtained substantially free of the meta-substituted impurity, the method comprising contacting a coumalate ester or acid and an unactivated alkene at elevated temperature in the presence of a metal oxidation catalyst and an oxidant. The metal oxidation catalyst can be palladium, such as palladium on carbon, and the oxidant can be the oxygen gas in ambient air. The reaction can be carried out without solvent or in high boiling hydrocarbon solvents such as mesitylene. When the unactivated alkene is a monosubstituted alkene, yields of at least about 50 or 60% of para-substituted ester and acid products, respectively, are obtained, substantially free of the regioisomeric meta-substituted impurity.

专利号:US-9617236-B2
优先权日:2013-05-22
标 题 :Synthesis of coumalic acid
发明人：KRAUS GEORGE A
权利人:UNIV IOWA STATE RES FOUND INC
摘要:A method to prepare coumalic acid comprising (a) heating a solution in dichloroethane of malic acid and sulfuric acid or a solution in dichloroethane of malic acid and a perfluorosulfonic acid or (b) adding an acid comprising sulfuric acid or a perfluorosulfonic acid to a solution of malic acid in dichloroethane to yield a solution that is heated for a period of time so as to convert the malic acid into a major amount of coumalic acid and, optionally, a minor amount of fumaric acid.

专利号:US-8871966-B2
优先权日:2013-03-15
标 题 :Regiospecific synthesis of terephthalates
发明人：KRAUS GEORGE A; LEE JENNIFER J
权利人:KRAUS GEORGE A; LEE JENNIFER J; UNIV IOWA STATE RES FOUND INC
摘要:A method for preparing 1,4-biscarboxylic acid esters of benzene is provided.

专利号:US-2014275608-A1
优先权日:2013-03-15
标题:Of regiospecific synthesis of terephthalates

专利号:US-2014288324-A1
优先权日:2011-07-22
标 题:Method of regioselective synthesis of substituted benzoates

专利号:US-9499465-B2
优先权日:2013-03-15
标题 :Synthesis of biobased and substituted terephthalic acids and isophthalic acids
发明人：FROST JOHN W
权利人:UNIV MICHIGAN STATE
摘要:Methods for producing bio-terephthalic acid and bio-isophthalic acid are provided. The methods comprise a cycloaddition reaction to produce bio-4-methyl-3-cyclohexene-1-carboxylic acid, and bio-3-methyl-3-cyclohexene-1-carboxylic from bio-isoprene and bio-acrylic acid. An aromatization reaction produces bio-para-toluic acid and bio-meta-toluic acid from the bio-4-methyl-3-cyclohexene-1-carboxylic acid, and bio-3-methyl-3-cyclohexene-1-carboxylic. An oxidation reaction produces the bio-terephthalic acid and iso-phthalic acid from the bio-para-toluic acid and bio-meta-toluic acid.