Direct iodination of 3- and 4-nitropyrazoles with a reagent based on iodine monochloride and silver sulfate

Article abstract of DOI:10.1007/BF02495102

The reagent obtained from iodine monochloride and silver sulfate in sulfuric acid easily iodinates 1-methyl-3-nitropyrazole under mild conditions to give 4-iodo or 4,5-diiodo derivatives. 1-Methyl-4-nitropyrazole was also directly iodinated with this reagent for the first time.