Enolates generated from α-bromo esters by the reduction with “Bu6CrLi3” react with oxiranes to afford γ-hydroxy esters and β-hydroxy esters, depending on the Lewis acid used as a promoter.
Boron trifluoride promoted aldol reaction of silyl ketene acetals with the intermediate generated by the DIBALH reduction of carboxylic acid esters
作者:Syunichi Kiyooka、Masashi Shirouchi
DOI:10.1021/jo00027a001
日期:1992.1
The intermediate generated by the DIBALH reduction of carboxylic acid esters undergoes a boron trifluoride promoted aldol reaction with silyl ketene acetals to afford the corresponding beta-hydroxy carboxylic acids esters in good yield.