Asymmetric synthesis of tetrahydrofurans by diastereoselective [3+2] cycloaddition of allylsilanes with α-keto esters bearing an optically active cyclitol as a chiral auxiliary
作者:Takahiko Akiyama、Takuya Yasusa、Keiichiro Ishikawa、Shoichiro Ozaki
DOI:10.1016/s0040-4039(00)74417-0
日期:1994.11
Tin (IV) chloride mediated [3+2] cycloadditions of allylsilanes with optically active α-keto esters derived from L-quebrachitol afforded tetrahydrofuran derivatives via 1,2-silyl migration with high level of diastereoselectivity. Removal of the chiral auxiliary gave silyl-substituted tetrahydrofurans of excellent optical purity.
氯化锡(IV)介导的烯丙基硅烷与衍生自L-邻苯二酚的光学活性α-酮酯的[3 + 2]环加成反应通过1,2-甲硅烷基迁移以高非对映选择性提供四氢呋喃衍生物。除去手性助剂得到具有优异光学纯度的甲硅烷基取代的四氢呋喃。