作者:T.H. Chan、T. Aida、P.W.K. Lau、V. Gorys、David N. Harpp
DOI:10.1016/s0040-4039(01)86495-9
日期:——
Ethyl propionate can be converted stereoselectively into geometrical isomers of O-ethyl-O-trimethylsilylmethylketene acetal (). The E-isomer of condenses with aldehydes by titanium tetrachloride to give stereoselectively the threo isomers of ethyl 2-methyl-3-hydroxy carboxylates.
丙酸乙酯可以立体选择性地转化为O-乙基-O-三甲基甲硅烷基甲基酮缩醛()的几何异构体。通过四氯化钛与醛缩合的E-异构体,有选择地立体生成2-甲基-3-羟基羧酸乙酯的苏式异构体。