Reaction Steps
3-(3-Cyclopentyloxy-4-methoxyphenyl)-N-hydroxy-3-(1-oxoisoindolinyl)propionamide was prepared by the procedure of Example 1 from 3-(3-cyclopentyloxy-4-methoxyphenyl)-3-(1-oxoisoindolinyl)propanoic acid (1.00 g, 2.53 mmol), carbonyldiimidazole (430 mg, 2.66 mmol) and hydroxylamine hydrochloride (230 mg, 3.29 mmol) in tetrahydrofuran (5 mL) to afford 3-(3-cyclopentyloxy-4-methoxyphenyl)-N-hydroxy-3-(1-oxoisoindolinyl)propionamide as a white solid (950 mg, 91% yield): mp, 183.0–184.5° C.; 1H NMR (DMSO-d6) δ 1.54–1.82 (m, 8H, C5H8), 2.82–2.86 (m, 2H, CH2), 3.70 (s, 3H, CH3), 4.13 (d, J=17.5 Hz, NCHH), 4.55 (d, J=17.5 Hz, 1H, NCHH), 4.73 (m, 1H, CH), 5.74 (t, J=7.6 Hz, 1H, NCH), 6.85–6.93 (m, 3H, Ar), 7.47–7.70 (m, 4H, Ar), 8.84 (br s, 1H, OH), 10.60 (1H, NH); 13C NMR (DMSO-d6) δ 23.50, 32.11, 32.18, 46.20, 51.17, 55.53, 79.52, 112.21, 114.00, 119.14, 122.78, 123.43, 127.85, 131.31, 131.86, 132.27, 141.65, 146.87, 149.07, 166.04, 166.91; Anal Calcd for C23H26N2O5 0.7 H2O: C, 65.30; H, 6.53; N, 6.62. Found: C, 65.59; H, 6.38; n, 6.65; H2O, 2.94.
