route to a potent GPR40 agonist AMG 837 is described. The crucial catalytic asymmetric conjugate addition of terminal alkyne was promoted by a soft Lewis acid/hard Brønsted base cooperative catalyst, allowing efficient construction of the requisite stereogenic center. The thioamide functional group is key to both activation in asymmetric alkynylation and facile transformation into carboxylic acid.
描述了有效 GPR40 激动剂
AMG 837 的简明对映选择性合成路线。软
路易斯酸/硬布朗斯台德碱协同催化剂促进了末端
炔烃的关键催化不对称共轭加成,从而有效地构建了必要的立体中心。
硫代酰胺官能团是不对称炔基化活化和轻松转化为
羧酸的关键。