Reaction of 7-phenyl-7H-pyrazolo-[3,4-d][1,2,3]triazin-4-ol with thionyl chloride
The reaction of 7-phenyl-7H-pyrazolo[3,4-d][1,2,3]triazin-4-ol with thionyl chloride has been studied in the presence and absence of dimethyl formamide. It was found that heating the compound with thionyl chloride in the absence of dimethyl formamide gave 5-amino-1-phenyl-1H-pyrazole-4-carboxylic acid chloride and in its presence a mixture of 5-chloro-N-formyl-1-phenyl-1H-pyrazole-4-carboxamide, 5-chloro-1-phenyl-1H-pyrazole-4-carboxamide, and 4-chloro-6-(5-chloro-1-phenyl-1H-pyrazol-4-yl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidine.