The enantioselective hydrogenation of a variety of α-keto acetals to the corresponding α-hydroxy acetals with Pt catalysts modified with cinchonidine derivatives is described with ees up to 97% and high reaction rates, and the influence of the substrate structure, the modifier and the reaction conditions (catalyst, solvent, temperature, pressure, modifier concentration) was investigated in some detail.
该论文描述了用
辛可尼丁衍
生物修饰的
铂催化剂将多种δ-酮
乙缩醛对映体选择性氢化为相应的δ-羟基
乙缩醛的过程,ees 高达 97%,反应速率高,并详细研究了底物结构、改性剂和反应条件(催化剂、溶剂、温度、压力、改性剂浓度)的影响。