反应详情

According to the procedure described in Example 6A Step 3a mixture of ethyl 7-nitro-2,3-dihydrobenzo[b][1,4]dioxine-6-carboxylate (1.72 g, 6.8 mmol) and Pd/C (10%, 0.2 g) in EtOAc (100 mL) was stirred under 1 atmosphere of hydrogen at room temperature overnight, to afford ethyl 7-amino-2,3-dihydrobenzo[b][1,4]dioxine-6-carboxylate as a solid (1.459 g, 96%). 1H NMR (300 MHz, CDCl3) δ 7.41 (s, 1H), 6.18 (s, 1H), 5.41 (br, 2H), 4.30 (m, 4H), 4.19 (q, 2H), 1.38 (t, 3H); LC-MS (ESI) m/z 224 (M+H)+.