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Report | Regular issue | Vol 24, No. 12, 1986, pp.3363-3368
Published online, 1st January, 1970
DOI: 10.3987/R-1986-12-3363
Heterocyclization Reactions with Carbodimides: Synthesis of Fused 1,2,4-Triazoles

Pedro Molina,* Mateo Alajarín, and Alicia Ferao

*Departmento de Química Orgánica, Facultad de Ciencias, Universidad de Murcia, 30071 Murcia, Spain

Abstract

Several N-amino heterocycles react with diaryl carbodiimides under neutral conditions to give fused 1,2,4-triazoles. In some cases the intermediate heteroaryl guanidines are isolated, which by thermal or basic treatment cyclized to neutral or mesoionic fused 1,2,4-triazoles.