作者:Matthew T. Knowe、Michael W. Danneman、Sarah Sun、Maren Pink、Jeffrey N. Johnston
DOI:10.1021/jacs.7b12185
日期:2018.2.14
The enantioselective desymmetrization of carboxylic acids by chiral Brønsted base catalysis is reported, leading to bridged bicyclic lactones with up to 94% ee. Crystallographic analysis of a substrate-catalyst complex suggests an origin of stereocontrol, reminiscent of functional Brønsted bases in biological settings, and enabled reaction optimization. The products contain an all-carbon quaternary
据报道,通过手性 Brønsted 碱催化对羧酸进行对映选择性去对称化,产生高达 94% ee 的桥连双环内酯。底物-催化剂复合物的晶体学分析表明立体控制的起源,让人想起生物环境中的功能性布朗斯台德碱,并实现反应优化。该产品含有全碳四元立体中心,可衍生为功能化环戊烷。