反应详情

According to the procedure described in Example 6A Step 3, a mixture of ethyl 4,5-bis(2-methoxyethoxy)-2-nitrobenzoate (8.53 g, 24.8 mmol) and Pd/C (10%, 0.85 g) in EtOAc (150 mL) was stirred under 1 atmosphere of hydrogen at room temperature overnight, to afford ethyl 2-amino-4,5-bis(2-methoxyethoxy)benzoate as an oil (7.15 g, 92%). 1H NMR (300 MHz, CDCl3) δ 7.44 (s, 1H), 6.15 (s, 1H), 5.60 (br, 2H), 4.30 (q, 2H), 4.13 (t. 2H), 4.08 (t, 2H), 3.78 (t, 2H), 3.73 (t. 2H), 3.45 (s, 6H), 1.36 (t, 3H); LC-MS (ESI) m/z 314 (M+H)+.