A simple synthesis of 1-substituted 5-aminopyrazoles and pyrazolo[1,5-a]-s-triazine derivative

Article abstract of DOI:10.3987/COM-98-8262

Dialkyl 5-amino-1-carbamoylpyrazole-3,4-dicarboxylates (3) and the 1-aryl derivatives (5) are synthesized directly by the reaction of semicarbazide (2) or arylhydrazines (4) with dialkyl (E)-2,3-dicyano-butendioates (1) in the presence of organic salts, s