Reaction Steps
3-(3-Ethoxy-4-methoxyphenyl)-N-hydroxy-3-phthalimidopropionamide was prepared by the procedure of Example 1 from 3-(3-ethoxy-4-methoxyphenyl)-3-phthalimidopropanoic acid (1.00 g, 2.71 mmol), N,N′-carbonyldiimidazole (461 mg, 2.84 mmol) and hydroxylamine hydrochloride (208 mg, 2.99 mmol) in tetrahydrofuran (6 mL) to afford 3-(3-ethoxy-4-methoxyphenyl)-N-hydroxy-3-phthalimidopropionamide as a white solid (800 mg, 77% yield): mp, 163.0-165.0° C.; 1H NMR (DMSO-d6) δ 1.31 (t, J=6.9 Hz, 3H, CH3), 3.11 (d, J=7.9 Hz, 2H, CH2), 3.72 (s, 3H, CH3), 3.97 (q, J=6.9 Hz, 2H, CH2), 5.67 (t, J=7.8 Hz, 1H, NCH), 6.90 (br s, 2H, Ar), 7.02 (br s, 1H, Ar), 7.86 (br s, 4H, Ar), 8.79 (br s, 1H, OH), 10.59 (br s, 1H, NH); 3C NMR (DMSO-d6) δ14.67, 34.22, 50.18, 55.44, 63.71, 111.73, 112.36, 119.65, 123.11, 131.18, 131.21, 134.56, 147.67, 148.53, 165.97, 167.61. Anal. Calcd for C20H20N2O6: C, 62.49; H, 5.24; N, 7.29. Found: C, 62.43; H, 5.04; N, 7.20.
