A New General Route to Acceptor-Substituted Vinyloxiranes via Siloxyoxiranes - Novel Promising Synthetic Building-Blocks
作者:Ernst Schaumann、Frank Tries
DOI:10.1055/s-2002-19796
日期:——
Epoxidation of silyl enol ethers 2a,b with dimethyldioxirane yields siloxyoxiranes 3a,b. Anions 4a-d lead to nucleophilic ring-opening in the acetal position C-1 of 3 to give diols 5a-d. Monotosylation and cyclisation provide acceptor-substituted vinyloxiranes 6a-d.
用二甲基二环氧乙烷环氧化甲硅烷基烯醇醚 2a,b 得到硅氧烷环氧乙烷 3a,b。阴离子 4a-d 导致 3 的缩醛位置 C-1 发生亲核开环,得到二醇 5a-d。单甲苯基化和环化提供受体取代的乙烯基环氧乙烷 6a-d。