Transition Metal, Azide, and Oxidant-Free Homo- and Heterocoupling of Ambiphilic Tosylhydrazones to the Regioselective Triazoles and Pyrazoles
作者:Subhankar Panda、Pradip Maity、Debasis Manna
DOI:10.1021/acs.orglett.7b00313
日期:2017.4.7
cyclization reaction of two identical or different tosylhydrazones has been developed to access various 4,5-disubstituted-2H-triazoles under transition metal, azide, and oxidant-free conditions. A mechanistic rationalization study led to the identification of several electronically diverse unsaturated systems for regioselective synthesis of 1- and 2-substituted 1,2,3-triazoles and pyrazoles.
以N-甲苯磺酰as为双亲试剂,已开发出两个相同或不同的甲苯磺酰hydr空前的环化反应,以在过渡金属,叠氮化物和无氧化剂条件下获得各种4,5-二取代-2 H-三唑。一项机械合理化研究导致鉴定出几种电子多样化的不饱和系统,用于区域选择性合成1和2取代的1,2,3-三唑和吡唑。