SYNTHESIS OF 1- AND 5-(PYRAZOLYL)TETRAZOLE AMINO AND NITRO DERIVATIVES
DOI:
https://doi.org/10.1007/3513Keywords:
nitropyrazole, tetrazole, N-amination, multinuclear NMR, nitration, reduction, regioselectivity, X-ray structural analysisAbstract
Regioselective introduction of nitro groups was studied in the case of pyrazoles containing a 1- or 5-tetrazole substituent at position 3(5). All the possible isomeric С-mononitropyrazoles were synthesized. The reduction of these compounds gave the respective 3(5)-amino-5(3)-tetrazolylpyrazoles, which were nitrated to 3(5)-nitramino-4-nitro-5(3)-tetrazolylpyrazoles. The reaction of 1-(nitropyrazol-3(5)-yl)tetrazoles with hydroxylamine-О-sulfonic acid produced the respective N-amino derivatives.
Authors: Igor L. Dalinger*, Alexandr V. Kormanov, Irina A. Vatsadze, Olga V. Serushkina, Tatyana K. Shkineva, Kyrill Yu. Suponitsky, Alla N. Pivkina, Aleksei B. Sheremetev