Hydrazine hydrate (1:1) → HCID 178526614, 화합물

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2-[1,3]-Dithietan-2-ylidene-1-(3-nitro-phenyl)-2-pyridin-4-yl-ethanone (5.2 g, 15.7 mmol) was suspended in absolute ethanol (60 mL) and heated to 60° C. Hydrazine monohydrate (3.05 mL, 63 mmol, 4 eq) was added dropwise and the mixture was stirred at 60° C. for 2 hours. The suspension was concentrated to about ¼ of the original volume, diluted with THF (30 mL) and stirred for 5 minutes. The solid was filtered, washed with THF and dried at 50° C. for 2 hours. 3.92 g of 5-(3-nitro-phenyl)-4-pyridin-4-yl-2H-pyrazole-3-thiol were obtained as an orange solid (84%).

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