Synthesis of 1,2,4‐Triazolo[4,3‐d][1,2,4]Triazepines By 1,3‐Dipolar Cycloaddition

Abstract

Abstract The reaction of N‐aryl‐C‐ethoxycarbonyl nitrilimines with [1,2,4]triazepin‐3,5‐dithione leads to title compounds. The 1,3‐dipolar cycloaddition is completely peri and regioselective. The preferred orientation of addition is predicted correctly by AM 1 calculation.