反应详情

The title compound was prepared in the same way as that described in Example 11, Step 1, using 2-methyl-5-nitrobenzoic acid (5 g, 27.6 mmol), methyl sulphonamide (2.63 g, 27.6 mmol), 4-dimethylaminopyridine (3.37 g, 27.6 mmol), 1-[3-(dimethylamino)propyl]-3-ethyl carbodiimide hydrochloride (5.29 g, 27.6 mmol) and anhydrous dichloromethane (200 ml). The title compound (5.67 g, 79%) was afforded as a colourless solid. mp 180° C. (dec.). 1H NMR (360 MHz, D6-DMSO) δ 2.50 (3H, s), 3.42 (3H, s), 7.61 (1H, d, J=8.5 Hz), 8.28 (1H, dd, J=8.4 and 2.5 Hz), 8.36 (1H, d, J=2.5 Hz), 12.46 (1H, brs).

1. customThe title compound was prepared in the same way as