反应详情

A mixture of fusaric acid (896 mg, 5.0 mmol), O,N-dimethylhydroxyl-amine hydrochloride (488 mg, 5 mmol), EDC (1.05 g, 5.5 mmol), HOBT (675 mg, 5.0 mmol) and NEt3 (1.4 ml, 10 mmol) in DMF (100 ml) was stirred at room temperature for 2 h. The reaction mixture was diluted with saturated aqueous NaCl and extracted with EtOAc (2×). The combined organic extracts were washed with 0.5 M citric acid, saturated aqueous NaHCO3, saturated aqueous NaCl, dried, and concentrated under vacuum to, give the desired product I-2A-38a as a viscous oil (940 mg): MS 232.2 (M+1)+; 1H NMR (400 MHz, CDCl3) δ 8.40 (s, 1H), 7.60–7.50 (m, 2H), 3.72 (s, 3H), 3.37 (s, 3H), 2.61 (t, 2H, J=7.5Hz), 1.62–1.53 (m, 2H), 1.38–1.28 (m, 2H), 0.89 (t, 3H, J=7.5 Hz).

1. extractionextracted with EtOAc (2×)
2. washThe combined organic extracts were washed with 0.5 M citric acid, saturated aqueous NaHCO3, saturated aqueous NaCl
3. customdried
4. concentrationconcentrated under vacuum to,