Synthesis of 4-amino-3,5-dicyano-arylpyrazoles : part 2 : isolation and charact...

• Author(s): Gonçalves, M. Sameiro T. ; Campos, Ana M. F. Oliveira ; Rodrigues, Lígia M. ; Proença, M. Fernanda R. P.
• Date: 2012
• Persistent ID: http://hdl.handle.net/1822/13220
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Pyrazolo[4,3-d]pyrimidines; Aminopyrazoles; Malononitrile; Aminocyanopyrazoles
• Document Type: Article
• Language: English

Description

Reaction of (dicyanomethylidene-hydrazino)benzoic acids with chloroacetonitrile, under basic conditions, gave cyanomethyl-3-(7-amino-3,5-dicyano-1H-pyrazolo[4,3-d]pyrimidin-1-yl-benzoates and para substituted cyanomethyl benzoates, in addition to the expected cyanomethyl 3-(4-amino-3,5-dicyano-1H-pyrazol-1-yl)-benzoates.