Metal-Free C(sp<sup>2</sup>)–H/N–H Cross-Dehydrogenative Coupling of Quinoxalinones with Aliphatic Amines under Visible-Light Photoredox Catalysis
作者:Wei Wei、Leilei Wang、Pengli Bao、Yun Shao、Huilan Yue、Daoshan Yang、Xiaobo Yang、Xiaohui Zhao、Hua Wang
DOI:10.1021/acs.orglett.8b03079
日期:2018.11.16
A novel and efficient visible-light-induced C(sp2)–H/N–H cross-dehydrogenative coupling (CDC)-amination with both primary and secondary aliphatic amines at room temperature in air is developed. This photocatalytic reaction allows the direct formation of 3-aminoquinoxalin-2(1H)-ones via CDC-amination in the absence of any external oxidant added from outside. Preliminary mechanistic studies reveal that
Copper-catalysed oxidative amination of quinoxalin-2(1H)-ones with aliphatic amines
作者:Yi Li、Ming Gao、Lianhui Wang、Xiuling Cui
DOI:10.1039/c6ob01283c
日期:——
A novel, efficient and practical method for copper-catalysed oxidative C-3 amination of quinoxalin-2(1H)-ones with primary or secondary amines as the nitrogen sources has been developed. A wide variety of 3-aminoquinoxalin-2(1H)-ones were prepared in up to 98% yield with good functional group tolerance for 24 examples. This synthetic strategy features atom economy, concise steps, easy operation, and