Enantioselective Hydroesterificative Cyclization of 1,6-Enynes to Chiral γ-Lactams Bearing a Quaternary Carbon Stereocenter
作者:Xinyi Ren、Lin Tang、Chaoren Shen、Huimin Li、Peng Wang、Kaiwu Dong
DOI:10.1021/acs.orglett.1c00952
日期:2021.5.7
A palladium-catalyzed asymmetric hydroesterification-cyclization of 1,6-enynes with CO and alcohol was developed to efficiently prepare a variety of enantioenriched γ-lactams bearing a chiral quaternary carbon center and a carboxylic ester group. The approach featured good to high chemo-, region-, and enantioselectivities, high atom economy, and mild reaction conditions as well as broad substrate scope
开发了一种用CO和醇进行钯催化的1,6-炔烃的不对称加氢酯化环化反应,以有效地制备各种带有手性季碳中心和羧酸酯基的对映体富集的γ-内酰胺。该方法具有良好的化学选择性,区域选择性和对映选择性,高原子经济性,温和的反应条件以及广泛的底物范围。结晶学证据和对照实验已经描述了这种方法的多种选择性与1,6-烯炔底物中酰胺连接基的N-取代基之间的相关性。