Ethylamine → HCID 57796850, compound

Participants

Reaction Steps

(Method H7) To a solution of 3-(4-benzoylamino-phenyl)-propionic acid (6b) (1.04 g, 3.86 mmol) in tetrahydrofuran (30 ml) under argon atmosphere 1,1′-carbonyldiimidazole (0.814 g, 5.0 mmol), was added and the mixture was stirred at room temperature for 1 hour. In an another vessel, a solution of hydroxylamine hydrochloride (0.805 g, 11.6 mmol) in dimethylformamide (10 ml) was treated with ethyl amine (1.62 ml, 11.6 mmol), the precipitate was filtered off and both solutions were mixed together. The resultant mixture was stirred at ambient temperature for 24 hours, concentrated under reduced pressure and diluted with 3% hydrochloric acid (15 ml). The resulting precipitate was filtered, washed with water (3×20 ml), and crystallized from acetonitrile to give the title compound as a white solid (0.790 g, 72%). M.p. 189-191° C. 1H NMR (DMSO-d6, HMDSO) δ: 2.26 (t, 2H, J=7.5 Hz); 2.79 (t, 2H, J=7.5 Hz); 7.17 (d, 2H, J=8.4 Hz); 7.45-7.60 (m, 3H); 7.67 (d, 2H, J=8.4 Hz); 7.88-8.02 (m, 2H); 8.73 (s, 1H); 10.18 (s, 1H); 10.38 ppm (s, 1H). HPLC analysis on Symmetry C18 column: impurities 1.8% (column size 3.9×150 mm; mobile phase acetonitrile−0.1M phosphate buffer (pH 2.5), 28:72; sample concentration 0.25 mg/ml; detector UV 220 nm). Anal. Calcd for C16H16N2O3, %: C, 67.59; H, 5.67; N, 9.85. Found, %: C, 67.46; H, 5.61; N, 9.87.

Provenance & Evidence