2-Fluoro-benzoic acid (1-amino-2-benzenesulfonyl-ethylidene)-hydrazide → 3-benzenesulfonylmethyl-5-(2-fluoro-phenyl)-1H-[1,2,4]triazole

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Reaction Steps

14 g (0.042 mol) 2-fluoro-benzoic acid (1-amino-2-benzenesulfonyl-ethylidene)-hydrazide were heated at 210° C. for 20 minutes. The molten mass was then cooled, dissolved in 40 ml hot ethanol and stirred overnight at room temperature. The precipitated crystals were filtered off and dried to yield 11.4 g (86%) 3-benzenesulfonylmethyl-5-(2-fluoro-phenyl)-1H-[1,2,4]triazole as beige solid, MS m/e (%): 317 (M+, 2), 253(68), 176(100), 122(61).

Provenance & Evidence