A combination of heterogeneous catalysis and photocatalysis for the olefination of quinoxalin-2(1<i>H</i>)-ones with ketones in water: a green and efficient route to (<i>Z</i>)-enaminones
features very mild conditions using a simple and cheap catalyst for the synthesis of (Z)-enaminones with moderate-to-good yields. Such a methodology successfully combines the heterogeneous Mannich reaction with photocatalysis, and provides a green and practical approach for the synthesis of potentially bioactive (Z)-enaminones with a 3,4-dihydroquinoxalin-2(1H)-one skeleton.
Photo-Induced Cross-Dehydrogenative Alkylation of Heteroarenes with Alkanes under Aerobic Conditions
作者:Jun Xu、Heng Cai、Jiabin Shen、Chao Shen、Jie Wu、Pengfei Zhang、Xiaogang Liu
DOI:10.1021/acs.joc.1c02125
日期:2021.12.17
We report a Minisci-type cross-dehydrogenative alkylation in an aerobic atmosphere using abundant and inexpensive cerium chloride as a photocatalyst and air as an oxidant. This photoreaction exhibits excellent tolerance to functional groups and is suitable for both heteroarene and alkane substrates under mild conditions, generating the corresponding products in moderate-to-good yields. Our method provides
The visible-light-triggered regioselective alkylation of quinoxalin-2(1<i>H</i>)-ones <i>via</i> decarboxylation coupling
作者:Hongdou Zhang、Jun Xu、Min Zhou、Jianming Zhao、Pengfei Zhang、Wanmei Li
DOI:10.1039/c9ob02203a
日期:——
An efficient protocol to synthesize 3-alkylated quinoxalin-2(1H)-ones through photocatalytic decarboxylation coupling reactions of quinoxalin-2(1H)-ones with N-hydroxyphthalimide ester was developed.