Richard N. Butler and Denise C. Grogan
J. Chem. Res. (S), 1997, 428-429
DOI:
10.1039/A705030E,
Paper
New substituted tricyclic 7,8,9,10-tetrahydro-3H-5,H-benzo[d]pyrrolo[1,2-c][1,2,3]triazoles 4 and 5 rearrange on heating to afford high yields of 1-arylamino-2-(4-cyanobutyl)-3,4-bis(alkoxycarbonyl)pyrroles 6 and 7.