Water → HCID 18780708, compound

Participants

Reaction Steps

A solution of 3-phthalimido-3-(3,4-diisopropoxyphenyl)propionic acid (1.0 g, 2.4 mmol), 1,1 carbonyldiimidazole (0.43 g, 2.6 mmol), and 4-dimethylaminopyridine (trace) in tetrahydrofuran (18 mL) was stirred for 1.5 hours at room temperature. To the solution was added ammonium hydroxide (0.24 mL, 3.7 mmol, 28-30%) and stirring was continued for 2 hours. The tetrahydrofuran was removed in vacuo leaving an oil. To the oil was added 2 mL of water and the mixture was stirred at room temperature overnight. The resulting slurry was filtered, the solid was washed with water, air dried, and dried in vacuo (60° C.,<1 mm) to afford 0.87 g (88%) of 3-phthalimido-3-(3,4-diisopropoxyphenyl)propionamide as a white solid: mp 153-154.5° C.; 1H NMR (DMSO-d6) δ 7.92-7.78 (m, 4H), 7.55 (s, 1H), 7.03(s, 1H), 6.93-6.77 (m, 3H), 5.71-5.56 (m, 1H), 4.514.33 (m, 2H), 3.25-3.06 (m, 2H), 1.31-1.08 (m, 12H); 13C NMR (DMSO-d6)δ 171.7, 168.3, 148.9, 133.9, 132.1, 131.9, 123.3, 120.9, 117.7, 72.2, 72.1, 51.5, 37.9, 22.2; Anal. Calcd. for C23H26N2O5. Theoretical: C, 67.30; H, 6.38; N, 6.82. Found: C, 67.01; H, 6.35; N, 6.69.

Provenance & Evidence