Abstract
A number of 3,4-, 4,5-diiodo- and 3,4,5-triiodo-1-methylpyrazoles 2a–f have been converted into the corresponding almost inaccessible 3-, 5-iodo- and 3,5-diiodo-1-methyl-4-nitropyrazoles 3a–f by nitration with an HNO3–H2SO4 mixture.
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