Diastereoselective alkylation and reduction of β-alkoxyacylsilanes: stereoselective construction of three contiguous stereogenic centers
作者:Mitsunori Honda、Naoto Ohkura、Shin-ichi Saisyo、Masahito Segi、Tadashi Nakajima
DOI:10.1016/j.tet.2003.08.050
日期:2003.10
α-silylalcohols in good yields with high diastereoselectivity similarly to the nucleophilic addition. And the treatment of acylsilanes having a phenyl group on silicon atom with fluoride ion results in the formation of phenyl carbinol derivatives via migration of the phenyl group with high diastereoselectivity.
衍生自二甲基乙缩醛和酰基硅烷甲硅烷基烯醇醚的醛醇缩合反应的,在α和β位置具有立体异构中心的酰基硅烷的亲核加成反应可高收率地得到相应的α-甲硅烷基醇,且具有非对映选择性。在完全保留构型的情况下进行α-甲硅烷基醇的丙二甲硅烷基化。另外,与亲核加成类似,还原在α和β位置具有立体异构中心的酰基硅烷以高收率提供了具有高非对映选择性的相应α-甲硅烷基醇。并且用氟离子处理在硅原子上具有苯基的酰基硅烷导致通过高非对映选择性的苯基的迁移形成苯基甲醇衍生物。