Method for the Production of Optically Active 3-Alkyl Carboxylic Acids and the Intermediate Products Thereof
申请人:Sorger Klas
公开号:US20070225519A1
公开(公告)日:2007-09-27
An enantioselective method for producing optically active 3-alkyl carboxylic acids comprises transforming an optically active secondary alcohol into an optically active, activated compound by introducing a leaving group; reacting the activated compound with a malonic acid derivative to obtain an optically active, alkylated malonic acid compound, the reaction taking place exclusively in ether and/or carboxylic acid ester solvents and one or more aprotic polar solvents or alcohols as a cosolvent in a maximum proportion of 30 volume percent of total solvent, wherein the added cosolvent is not hexamethyl phosphoric acid triamide; the malonic acid compound is hydrolyzed if necessary to obtain the corresponding acid; and the corresponding acid is decarboxylated.
一种产生光学活性3-烷基羧酸的对映选择性方法包括将光学活性的次级醇转化为光学活性的活化化合物,方法是引入一个离去基;将活化的化合物与丙二酸衍生物反应,以获得光学活性的烷基化丙二酸化合物,反应仅在醚和/或羧酸酯溶剂中进行,并且添加一种或多种无水极性溶剂或醇作为共溶剂,最大比例为总溶剂的30体积百分比,其中添加的共溶剂不是六甲基膦酰胺;必要时,对丙二酸化合物进行水解以获得相应的酸;并且通过脱羧反应获得相应的酸。