1,2,3,5-Tetrazines and 1,2,3-triazaspiro[4.4]nonanes: remarkable products from 1,3-dipolar cycloadditions of N-sulphinylamines with substituted triazolium imides

Abstract

Cycloadditions of aryl-N-sulphinylamines with substituted triazolium imides gave new 8π-2,4,5,6-tetrasubstituted-1,2,3,5-tetrazines, the X-ray crystal structure 〈′Uone of which is reported; strained tricyclic tetra-aza tetracyclo[4.3.1.0^1,6]decenes are suspected as intermediates and attempts to intercept them led to new substituted 1,2,3-triazaspiro[4.4]nonanes, the X-ray crystal structure of one of which is reported.