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。