[1,2,3]Triazolo[4,5-d][1,3,2]thiazaphospholes: a new fused NPS ring system from a cycloaddition–rearrangement sequence with Lawesson’s reagent, a super dipolarophile
作者:Richard N. Butler、Elaine C. McKenna
DOI:10.1039/a706306g
日期:——
A new fused NPS ring system has been obtained from the reaction of substituted 1,2,3-triazolium-1-imide 1,3-dipoles with Lawessonâs reagent
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
作者:Richard N. Butler、D. Cunningham、Patrick McArdle、Gerard A. O'Halloran
DOI:10.1039/c39880000232
日期:——
Cycloadditions of aryl-N-sulphinylamines with substitutedtriazoliumimides 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[4.3.1.01,6]decenes are suspected as intermediates and attempts to intercept them led to new substituted1,2,3-triazaspiro[4.4]nonanes, the X-ray crystal structure of one of