Acetic Acid → 4-bromo-3-(2H-1,2,3-triazol-2-yl)thiophene-2-amine

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Reaction Steps

A mixture of 2-(4-bromo-2-nitrothiophen-3-yl)-2H-1,2,3-triazole (0.59 g, 2.15 mmol), iron powder (0.75 g, 13.38 mmol), glacial acetic acid (8.4 mL) and H2O (1.2 mL) was heated in an oil bath set at 70° C. under condenser with N2 (g) inlet for 1 h. Purification by flash chromatography (silica, 40:60 ethyl acetate/hexane) gave 4-bromo-3-(2H-1,2,3-triazol-2-yl)thiophene-2-amine (0.35 g, 66%). Retention time (min)=1.540, method [4], MS (ESI) 246.9 (M+H).

Provenance & Evidence