Organocatalyzed regioselective and enantioselective synthesis of 1,4- and 1,2-dihydropyridines
作者:Truong-Giang Le、Hoai-Thu Pham、James P. Martin、Isabelle Chataigner、Jean-Luc Renaud
DOI:10.1080/00397911.2020.1778034
日期:2020.9.1
first examples of asymmetric organocatalyzed synthesis of 1,2-dihydropyridines, affording enantioselective access to and partially solving regioselectivity challenges in the synthesis of dihydropyridines. We demonstrate that through modification of organocatalysts both 1,2- and 1,4-dihydropyridines (1,2- and 1,4-DHPs) can be obtained with high regioselectivity (ratio of 1,2-DHP/1,4-DHP from 95/5 to 0/100)
摘要在此,我们介绍了 1,2-二氢吡啶不对称有机催化合成的第一个例子,提供了对映选择性访问并部分解决了二氢吡啶合成中的区域选择性挑战。我们证明,通过有机催化剂的改性,可以以高区域选择性(1,2-DHP/1,4-DHP 的比率)获得 1,2- 和 1,4- 二氢吡啶(1,2- 和 1,4-DHP)从 95/5 到 0/100)和对映选择性(1,2-DHP 的 ee 为 33%,1,4-DHP 的 ee 高达 98%),产率高(高达 87%)。图形概要