Catalyst-controlled mono- and diolefinations of arenes via C–H activation in water with reaction times of tens of minutes.
芳烃的催化控制的单烯烃化和双烯烃化,通过水中的C-H活化,在数十分钟内完成反应。
Palladium-Catalyzed Ortho-Alkoxylation of 2-Aryl-1,2,3-triazoles
作者:Suping Shi、Chunxiang Kuang
DOI:10.1021/jo5008306
日期:2014.7.3
Palladium-catalyzed alkoxylation of 2-aryl-1,2,3-triazoles was described in the presence of various groups in the aromatic rings. In addition, some other directing groups of heterocycles containing nitrogen were explored.
Palladium-Catalyzed 2<i>H</i>-1,2,3-Triazole-Directed Oxidative Alkoxylation of Arenes with Alcohols
作者:Wenjuan Shi、Zhangjie Shi
DOI:10.1002/cjoc.201400462
日期:2014.10
A palladium catalyzed ortho‐alkoxylation of aryl CH bond was accomplished with primary and secondary alcohols as alkoxylation reagents and with triazole as new directing group. This transformation has a good functional group tolerance and is not sensitive to moisture and air.
The first example of tetrazole‐directed meta‐selective C−H nitration is described. This transformation provided a straightforward approach for the synthesis of biologically important m‐nitroaryltetrazoles in moderate to excellent yields with good functional group compatibility. In addition, new metallo‐β‐lactamase inhibitors were obtained by further transformation of the synthesized m‐nitroaryltetrazoles
The palladium‐catalyzed acylation of 2‐aryl‐1,2,3‐triazoles with aldehydes viaCHbondactivation is described. A wide variety of products was isolated in good to excellent yields. This finding provides a new and useful strategy for the synthesis of aromatic ketones.