Pyrazolothiadiazoles from 3-Aminopyrazoles: The Hetero-Herz Reaction

Article abstract of DOI:10.1021/jo00181a018

The reaction of sulfur monochloride with pyrazoleamines gives good to excellent yields of pyrazolodithiazolium chlorides from a hetero-Herz reaction.No chlorination of the pyrazole nucleus was observed - a normal occurrence in Herz reactions.The Herz salts were converted to novel pyrazolothiadiazoles.