A Highly Diastereoselective Synthesis of (1<i>R</i>)-(+)-Camphor-Based Chiral Allenes and Their Asymmetric Hydroboration−Oxidation Reactions
作者:Shang-Cheng Hung、Yen-Fang Wen、Jia-Wen Chang、Chun-Chen Liao、Biing-Jiun Uang
DOI:10.1021/jo016201i
日期:2002.2.1
Synthesis of camphor derived chiral allenes and their hydroboration-oxidation reactions are described. Reaction of (1R)-(+)-camphor with alkynyllithium followed by the reduction of the resulted propargyl alcohol derivatives using AlH3 furnished chiral allenes 2a-g in excellent yields with high diastereoselectivity. Reduction of the propargyl alcohols with aluminum hydride proceeded through selective