Chiral Carboxylic Acid Enabled Achiral Rhodium(III)‐Catalyzed Enantioselective C−H Functionalization
作者:Luqing Lin、Seiya Fukagawa、Daichi Sekine、Eiki Tomita、Tatsuhiko Yoshino、Shigeki Matsunaga
DOI:10.1002/anie.201807610
日期:2018.9.10
CpxRhIII/chiral carboxylic acid catalyzed asymmetric C−H alkylation of diarylmethanamines with a diazomalonate, followed by cyclization and decarboxylation to afford 1,4‐dihydroisoquinolin‐3(2H)‐one. Secondary alkylamines as well as nonprotected primary alkylamines underwent the transformation with high enantioselectivities (up to 98.5:1.5 e.r.) by using a newly developed chiral carboxylic acid as the sole source
报告的是非手性Cp x Rh III /手性羧酸与重氮丙二酸酯催化的二芳基甲胺的不对称CH烷基化反应,然后环化和脱羧得到1,4-二氢异喹啉-3(2H)-一。通过使用新开发的手性羧酸作为唯一的手性来源,通过一致的金属化-去质子化机理实现对映选择性CH裂解,仲烷基胺和未保护的伯烷基胺都经历了高对映选择性(高达98.5:1.5 er)的转化。