反应详情

A mixture of N-Benzyloxy-3-(3-ethoxy-4-methoxyphenyl)-3-(4-nitrophthalimido)-propionamide (2.3 g, 4.42 mmol) and Pd(OH)2/C (600 mg) in ethyl acetate/methanol/tetrahydrofuran (150 mL each) was shaken under hydrogen. After 24 hours the suspension was filtered through a pad of Celite, and then was washed with methanol (30 mL) and methylene chloride (30 mL). The filtrate was concentrated in vacuo to give an oil. The oil was stirred with ethyl acetate (10 mL) to afford 3-(4-aminophthalimido)-3-(3-ethoxy-4-methoxyphenyl)-N-hydroxypropionamide as a yellow solid (1.8 g, 100% yield): mp, 193.0–195.0° C.; 1H NMR (DMSO-d6) δ 1.31 (t, J=6.9 Hz, 3H, CH3), 3.05 (d, J=7.9 Hz, 2H, CH2), 3.71 (s, 3H, CH3), 3.96 (q, J=7.0 Hz, 2H, CH2), 5.57 (t, J=7.9 Hz, 1H, NCH), 6.47 (br s, 2H, NH2), 6.77 (dd, J=2.0, 8.3 Hz, 1H, Ar), 6.83–6.88 (m, 3H, Ar), 6.99 (br s, 1H, Ar), 7.45 (d, J=8.3 Hz, 1H, Ar), 8.78 (br s, 1H, OH), 10.55 (1H, NH); 13C NMR (DMSO-d6) δ 14.69, 34.51, 49.75, 55.45, 63.73, 106.82, 111.74, 112.38, 116.32, 116.73, 119.60, 124.89, 131.85, 134.18, 147.62, 148.42, 155.00, 166.111, 167.70, 168.00; Anal Calcd for C20H21N3O6: C, 60.14; H, 5.30; N, 10.52. -Found: C, 60.00; H, 5.34; N, 10.30.

1. filtrationAfter 24 hours the suspension was filtered through a pad of Celite
2. washwas washed with methanol (30 mL) and methylene chloride (30 mL)
3. concentrationThe filtrate was concentrated in vacuo
4. customto give an oil