Sodium Bicarbonate → 4-(3-Methyl-1,2,4-thiadiazol-5-yl)aniline

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Reaction Conditions

Reaction Steps

To a suspension of 3-methyl-5-(4-nitro-phenyl)-[1,2,4]thiadiazole (422 mg, 1.9 mmol, CAS 800408-77-9, Wilkins, D. J.; Bradley, P. A. Science of Synthesis (2004), 13, 277-295.) in ethanol (19 mL) was added under stirring tin(II)chloride (1.86 g, 9.54 mmol) and heated to 70° C. for 4 hours. The mixture was poured on cold aqueous saturated sodium hydrogen carbonate solution. The suspension was stirred for 30 minutes and the solid was filtered off, washed with water. The residue was heated two to three times with tetrahydrofurane and filtered. The aqueous layer was extracted twice with ethyl acetate. The combined organic layers were dried over sodium sulfate and the solvent was evaporated under reduced pressure. The residue was stirred with diethyl ether and the solid was filtered off and washed with diethyl ether/heptane to yield the title compound as a yellow solid (355 mg, 97%). MS ISP (m/e): 192.2 (100) [(M+H)+]. 1H NMR (DMSO-D6, 300 MHz): δ (ppm)=7.64 (d, 2H), 6.63 (d, 3H), 6.01 (BR s, 2H, NH2), 2.54 (s, 3H).

Provenance & Evidence