Methanol → 3-Methoxy-5-(thiophen-3-yl)aniline

Participants

Reaction Steps

To a mixture of 3-(3-methoxy-5-nitro-phenyl)-thiophene (3.78 g, 16.07 mmol), zinc dust (10.72 g, 160.7 mmol), and ammonium chloride (12.89 g, 241.1 mmol) were added methanol (50 mL) and water (25 mL) at room temperature. After addition of water, the reaction became exothermic. The suspension was stirred for 1 h and the reaction mixture was filtered through the Celite. The filter cake was washed with water and methanol. The filtrate was concentrated to remove methanol and the residue was extracted with ethyl acetate (2×100 mL). The combined extracts were washed with brine solution (100 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was then purified by using an ISCO 120 g column, eluting with 0-20% ethyl acetate in hexanes to afford 3-methoxy-5-thiophen-3-yl-phenylamine (3.08 g, 93%) as a light yellow solid: ES(+)-HRMS m/e calculated for C11H11NOS (M+H)+ 206.0634, found 206.0634.

Provenance & Evidence