作者:Izzat T. Raheem、Steven N. Goodman、Eric N. Jacobsen
DOI:10.1021/ja039550y
日期:2004.1.28
The catalytic, asymmetric syntheses of quinine and quinidine were achieved in 16 steps. The recently developed salen(Al)-catalyzed enantioselective Michael addition of methyl cyanoacetate served to set the crucial C4 stereocenter in 92% ee, and a late-stage asymmetric dihydroxylation was used to differentiate the common intermediate and access the two desired diastereomeric products with high selectivity
奎宁和奎尼丁的催化不对称合成分 16 步完成。最近开发的salen(Al)催化的氰基乙酸甲酯的对映选择性迈克尔加成用于将关键的C4立体中心设置为92%ee,并且后期不对称二羟基化用于区分常见中间体并获得两种所需的具有高的非对映体产品选择性。