An organoselenium-catalyzed N1- and N2-selective aza-Wacker reaction of alkenes with benzotriazoles is reported, which provides easy access to N1- and N2-olefinated benzotriazole derivatives. The wide substrate scope, good functional group tolerance, and facile scale-up of this method are expected to promote its potential application in synthetic chemistry. A preliminary mechanism is proposed to explain
Highly efficient synthesis of vinyl substituted triazoles by Au(I) catalyzed alkyne activation
作者:Haifeng Duan、Wuming Yan、Sujata Sengupta、Xiaodong Shi
DOI:10.1016/j.bmcl.2009.03.096
日期:2009.7
Au(I) catalyzed 1,2,3-triazole addition to non-activated alkyne was reported. A large group of substituted NH-1,2,3-triazoles were suitable for this transformation along with both internal and terminal alkynes. The N-1 and N-2 vinyl substituted 1,2,3-triazoles were prepared in up to 98% yield with as low as 0.2% catalyst loading, thereby providing a new protocol for the synthesis of potentially biological-active vinyl-triazole building blocks. (C) 2009 Elsevier Ltd. All rights reserved.