反应详情

2-Methylsulfonyinitrobenzene (6.0g, 0.03 mol) was suspended in absolute ethanol (60 mL). 6% Pd/C catalyst (50% wet; 1.01 g) was added and the suspension was hydrogenated in a Parr shaker at 40 psi for 16 hours. The catalyst was then filtered over a pad of infusorial earth and washed with ethanol (2×10 ml). The filtrate was concentrated to dryness on a rotary evaporator. 4.94 g (96% yield) of the product was obtained as white crystals. mp 82-84° C. 1H NMR (CDCl3) δ 7.7 (dd, 1H), 7.2-7.3 (m, 1H), 6.5-6.8 (m, 2H), 5.04 (bs, 2H), 3.07 (s, 3H); CIMS (m/e) 172 (M+H+, 100%).

1. filtrationThe catalyst was then filtered over a pad of infusorial earth
2. washwashed with ethanol (2×10 ml)
3. concentrationThe filtrate was concentrated to dryness on a rotary evaporator