An efficient route to polyiodopyrazoles, 3,4,5-triiodopyrazole (1), 1-methyl-3,4,5-triiodopyrazole (2) and 1-diiodomethyl-3,4,5-triiodopyrazole (3), opens the door to prospective biocides. Nitration of 1 and 2 gives the previously inaccessible compounds, 3,4-dinitro-5-iodopyrazole (4), and 3,4-dinitro-5-iodo-1-methylpyrazole (5), respectively. These synthetic pathways will open many fronts for pyrazole chemistry.
D. Chand and J. M. Shreeve, Chem. Commun., 2015, 51, 3438 DOI: 10.1039/C4CC09775K
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