Esters α-méthyléniques par substitution d'éthers et d'acétates dérivés de l'α-(hydroxyméthyl)acrylate d'éthyle
作者:Hassen Amri、Monique Rambaud、Jean Villiéras
DOI:10.1016/0022-328x(90)87047-h
日期:1990.2
α-(Methylene)alkanoic esters are prepared in high yields by substitution of α-(acetoxymethyl)acrylates using Grignard reagents in the presence of a catalytic amount of copper(I) salt. This reaction can be applied to lithium enolates of esters and ketones and to give functional α-(methylene) alkanoic esters, products of great interest for the synthesis of active biological compounds (sarkomycin, α-(methylene)
通过在催化量的铜(I)盐存在下使用格氏试剂替换α-(乙酰氧基甲基)丙烯酸酯,可以高产率制备α-(亚甲基)链烷酸酯。该反应可用于酯和酮的烯醇锂,并得到功能性α-(亚甲基)链烷酸酯,这对于合成活性生物化合物(沙克霉素,α-(亚甲基)δ-戊内酯)具有重要意义。