Diastereoselective and Branched-Aldehyde-Selective Tandem Hydroformylation–Hemiaminal Formation: Synthesis of Functionalized Piperidines and Amino Alcohols
作者:Rachael Pittaway、José A. Fuentes、Matthew L. Clarke
DOI:10.1021/acs.orglett.7b01049
日期:2017.6.2
developed for the synthesis of chiral functionalized piperidines, with very good diastereoselectivity and branched regioselectivity using Rh/(S,S,S)-BOBPHOS catalysts. Tandem hydroformylation–hemiacetal formation also proceeds with good diastereoselectivity (88:12), with the hemiacetal product being hydrogenated with retention of stereochemistry to give a chiral intermediate used in the synthesis of the new
从容易获得的烯丙基甘氨酸开始,已开发出串联加氢甲酰化-半胱氨酸形成反应,用于合成手性官能化哌啶,使用Rh /(S,S,S)-BOBPHOS催化剂具有非常好的非对映选择性和支链区域选择性。串联加氢甲酰化-半缩醛的形成也具有良好的非对映选择性(88:12),半缩醛产物被氢化并保留了立体化学,从而提供了一种手性中间体,用于合成新的抗生素奈诺沙星。