General synthetic routes to β-hydroxy-acids from t-butyl esters and the Reformatskii reaction
作者:D. A. Cornforth、A. E. Opara、G. Read
DOI:10.1039/j39690002799
日期:——
modified Reformatskii procedure which leads directly to the hydroxy-acid. With highly hindered ketones or under conditions of inverse addition, self-condensation of the Reformatskii reagents from the t-butyl esters of α-bromopropionic acid and α-bromoisobutyric acid seriously reduce the yields of β-hydroxy-esters.
通过(a)通过Reformatskii反应制得的叔丁基β-羟基酯的脱烷基化,以及(b)直接导致羟基的改进的Reformatskii方法,可以高收率合成各种各样的β-羟基酸。-酸。在高度受阻的酮中或在反加条件下,Reformatskii试剂从α-溴丙酸和α-溴异丁酸的叔丁基酯中的自缩合会严重降低β-羟基酯的收率。