[4 + 1] Cycloaddition Reaction of α,β-Alkynic Hydrazones and KSCN under Transition-Metal-Free Conditions: Synthesis of <i>N</i>-Iminoisothiazolium Ylides
作者:Bei-Bei Liu、Wen-Bin Cao、Fei Wang、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.8b01725
日期:2018.9.21
A novel heteroannulation reaction between α,β-alkynic hydrazones and potassium thiocyanate has been developed for the synthesis of N-iminoisothiazolium ylides. The transformation features wide substrate scope, functional tolerance, and easy operation. This investigation involves a [4 + 1]-type cycloaddition reaction and C–S/S–N bond formation under transition-metal-free conditions. The application