Visible-Light-Promoted Metal-Free 3-Arylation of 2-Aryl-2H-indazoles with Triarylsulfonium Salts
作者:Kai Sun、Bing Yu、Anzai Shi、Panjie Xiang、Yanxuan Wu、Chang Ge、Yan Liu
DOI:10.1055/a-1938-9550
日期:2023.3
An efficient approach for the photosynthesis of various arylated 2-aryl-2H-indazoles (38 examples) in moderate to good yields (up to 87% yield) under mild conditions was developed by employing 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) as an inexpensive photocatalyst. This protocol features wide substrate scope, good functional group tolerance, and operational simplicity. In addition
Unprecedented ortho-acylation of azoxybenzenes with α-oxocarboxylic acids by Pd-catalyzed C–H activation and decarboxylation
作者:Hongji Li、Pinhua Li、Qiong Zhao、Lei Wang
DOI:10.1039/c3cc45492d
日期:——
A palladium-catalyzed ortho-acylation reaction of azoxybenzenes with α-oxocarboxylic acids was developed in the presence of K2S2O8. The established methodology provides a direct approach to obtain acylated azoxybenzenes in good yields.