A CONVENIENT METHOD FOR THE PREPARATION OF ENOL ACETATES OF α-KETO ESTERS BY THE ALKYLATION OF CYANOHYDRIN SILYL ETHERS DERIVED FROM GLYOXYLIC ESTERS WITH BENZYL AND ALLYL HALIDES
作者:Teruaki Mukaiyama、Takeshi Oriyama、Masahiro Murakami
DOI:10.1246/cl.1983.985
日期:1983.7.5
Cyanohydrin silyl ethers, prepared by trimethylsilylcyanation of glyoxylic esters, smoothly react with LDA (lithium diisopropylamide) to yield the lithium salts, which in turn react with alkyl halides such as allyl bromide to give, after acetylation, the corresponding enol acetates of α-keto esters in good yields.
通过乙醛酸酯的三甲基甲硅烷基氰化制备的氰醇甲硅烷基醚与 LDA(二异丙基氨基锂)顺利反应生成锂盐,锂盐又与烷基卤如烯丙基溴反应,乙酰化后生成相应的 α-酮的烯醇乙酸酯酯收率良好。