Methylation of 4-nitro-3(5)-pyrazolecarb
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Andrzej Regiec; Henryk Mastalarz; Agnieszka Mastalarz; Andrzej Kochel
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Article
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2009
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Elsevier Science
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French
β 230 KB
Reactions of 4-nitro-3(5)-pyrazolecarboxylic acid dipotassium salt with different methylating agents in various solvents have been investigated to improve the synthesis of isomeric 1-methyl-4-nitro-3-and -5-pyrazolecarboxylic acids.