申请人:Bracco Industria Chimica S.p.A.
公开号:US04278808A1
公开(公告)日:1981-07-14
3-Alkoxy-2-alkyl-propionic acid derivatives are prepared by catalytic hydrogenation of the acrylic acid analogs. The latter are obtained by CO treatment of lower alkyl esters of alkanoic acids having 3-6 carbon atoms in the presence of alkali metal methylate and condensation of the resulting 2-formylalkanoic acids or their alkali metal enolates with compounds of the formula X--(CH.sub.2).sub.m --Z wherein X is Cl, Br, or OH, and Z is Cl, Br, I, alkyl- or arylsulfonyl, or OH.
3-烷氧基-2-烷基丙烯酸衍生物是通过对丙烯酸类似物进行催化氢化制备的。后者是通过在碱金属甲酸盐存在下处理含有3-6个碳原子的烷基酸酯的CO,然后将所得的2-甲酰基烷酸或其碱金属烯醇酸盐与化合物X--(CH.sub.2).sub.m --Z进行缩合得到的,其中X为Cl、Br或OH,Z为Cl、Br、I、烷基磺酰基或芳基磺酰基,或OH。