Stereoselective reactions. XIX. Asymmetric dihydroxylation of olefins by employing osmium tetroxide-chiral amine complexes.
作者:Kiyoshi TOMIOKA、Yuichi SHINMI、Kunihiko SHIINA、Makoto NAKAJIMA、Kenji KOGA
DOI:10.1248/cpb.38.2133
日期:——
Enantioselective dihydroxylation of E-stilbene afforded (1S, 2S)-1, 2-diphenyl-1, 2-ethanediol in 70% ee by employing a stoichiometric amount of osmium tetroxide-chiral amine 5, prepared from N-methylephedrine and 2-bromopyridine.
使用一定量的四氧化锇手性胺 5(由 N-甲基麻黄碱和 2-溴吡啶制备)对 E-二苯乙烯进行对映体选择性二羟基化,可得到(1S, 2S)-1, 2-二苯基-1, 2-乙二醇,eee 为 70%。