Synthesis of vicinal aminoiodo- and (acetylamino)iodo-1-alkylpyrazoles

Article abstract of DOI:10.1007/BF01431121

3- and 5-(Acetylamino)-4-iodo-1-alkylpyrazoles were obtained by successive acylation and iodination from 3- and 5-amino-1-alkylpyrazoles without isolating intermediate (acetylamino)pyrazoles. 3- and 5-Iodo- and 3,5-diiodo-4-amino-1-methylpyrazoles were synthesized from appropriate iodonitropyrazoles by reduction with SnCl₂ in HCl.