4-Iodo-1-methylpyrazoles react with a nitrating mixture at 55 degrees C to give the corresponding 4-nitro-1-methylpyrazoles. The qualitative dependence of the nitrodeiodination rate on the structure of the heterocycles and the reaction conditions was considered.
Direct iodination of 3- and 4-nitropyrazoles with a reagent based on iodine monochloride and silver sulfate
作者:V. K. Chaikovskii、T. S. Kharlova、E. V. Tretyakov、S. F. Vasilevsky、V. D. Filimonov
DOI:10.1007/bf02495102
日期:2000.8
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.
VASILEVSKIJ S. F.; SHVARTSBERG M. S., IZV. AN CCCP. CEP. XIM., 1980, HO 5, 1071-1077