Allylsilanes in organic synthesis; double asymmetric induction in the dihydroxylation of a chiral allylsilane
作者:Richard A. Ward、Garry Procter
DOI:10.1016/0040-4020(95)00736-r
日期:1995.11
of methyl E-2-methyl-3-(phenyldimethylsilyl)hept-4-enoate, has been studied; the diastereoselectivity can be increased by using potassium ferricyanide as the stoichiometric oxidant and by double asymmetric induction using dihydroquinidine p-chlorobenzoate as catalyst. The major product of one of these reactions, (±)-(3R, 4S, 5S)-5-(1′ R)-hydroxypropyl-3-methyl-4-(phenyldimethylsilyl)-dihydrofuran-2-one
已经研究了酯-烯丙基硅烷,特别是甲基E -2-甲基-3-(苯基二甲基甲硅烷基)庚-4-烯酸酯的立体异构体的二羟基化的非对映选择性。非对映选择性可以通过使用铁氰化钾作为化学计量的氧化剂和通过使用二氢奎尼丁对氯苯甲酸酯作为催化剂的双不对称诱导来提高。这些反应中的一个的主要产物,(±) - (3 - [R,4小号,5小号)-5-(1' - [R ) -羟丙基-3-甲基-4-(苯基二) -二氢呋喃-2-酮,将术语“苯丙氨酸酯”召集至对应于天然产物培昔拉星的氨基酸部分的立体异构体之一的单元。