Visible-Light-Induced α-Amino C–H Bond Arylation Enabled by Electron Donor–Acceptor Complexes
作者:Chang Xu、Fang-Qi Shen、Gaofeng Feng、Jian Jin
DOI:10.1021/acs.orglett.1c00984
日期:2021.5.21
Enabled by electron donor–acceptor complexes, a novel visible-light-induced α-amino C–H bond arylation protocol, without a photoredox catalyst, has been disclosed. The protocol does not require any transition metal, oxidant, or exclusion of oxygen or moisture. A direct irradiation of the mixture of tertiary amines and benzonitriles with visible light in N,N-diethylethanamide in the presence of Cs2CO3
通过电子供体-受体配合物,已公开了一种新型的可见光诱导的α-氨基CH键芳构化方案,无需光氧化还原催化剂。该协议不需要任何过渡金属,氧化剂,也不需要氧气或湿气。在Cs 2 CO 3存在下,在N,N-二乙基乙酰胺中用可见光直接照射叔胺和苄腈的混合物,得到良好产率的α-芳基化胺。
Cyclometalated Ruthenium Catalyst Enables Selective Oxidation of <i>N</i>-Substituted Tetrahydroquinolines to Lactams
作者:Monuranjan Konwar、Tapashi Das、Animesh Das
DOI:10.1021/acs.orglett.3c04263
日期:2024.2.16
Herein, we report an unusual α-methylene oxidation of N-substituted tetrahydroquinoline to lactams using the cyclometalated Ru(II)-complex as a catalyst. Cyclic-α-methylene C–H bonds are selectively oxidized under the reaction conditions even in the presence of α-methyl or reactive α-methylene C–H bonds. This methodology is also useful in the late-stage functionalization of pharmaceuticals. Mechanistic