Chemistry of Heterocyclic Compounds p. 1326 - 1330 (1983)
Update date:2022-08-03
Topics:
Perevalov, V. P.
Andreeva, M. A.
Baryshnenkova, L. I.
Manaev, Yu. A.
Yamburg, G. S.
et al.
3-Bromo-1,5-dimethyl-4-nitropyrazole does not react upon heating with aqueous ammonia, while 1,5-dimethyl-3,4-dinitropyrazole under the same conditions yields 3-amino-1,5-dimethyl-4-nitropyrazole, which is formed from 3-bromo-1,5-dimethyl-4-nitropyrazole in the presence of a copper catalyst.The amination of 1-methyl-3,4-dinitropyrazole-5-carboxylic acid is accompanied by decarboxylation, which is characteristic for 4-substituted 1-methylpyrazole-5-carboxylic acids upon heating in aqueous ammonia or water.
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Doi:10.1021/ja00323a065
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