反应详情

To a solution of 4-(2-chloro-ethoxy)-5-methoxy-2-nitro-benzoic acid methyl ester (2.7 g, 9.32 mmol) in ethyl acetate (30 mL) was added 10% Pd/C (405 mg) and the mixture was stirred under H2 for 12 h. Completion of the reaction was monitored by LCMS. The reaction mixture was filtered using a celite pad and was washed with excess ethyl acetate and evaporated to dryness to afford the pure 2-amino-4-(2-chloro-ethoxy)-5-methoxy-benzoic acid methyl ester (2.40 g, 99%) as a solid. 1H NMR (300 MHz, DMSO-d6) δ 7.15 (s, 1H), 6.40 (s, 2H), 6.35 (s, 1H), 4.18 (t, 2H), 3.95 (t, 2H), 3.70 s, 3H), 3.65 (s, 3H), LC-MS (ESI) m/z 260 (M+H)+.

1. filtrationThe reaction mixture was filtered
2. washwas washed with excess ethyl acetate
3. customevaporated to dryness