反应详情

A suspension of (S)-2-(4-benzyloxy-phenylcarbamoyl)-pyrrolidine-1-carboxylic acid benzyl ester (7.0 g, 16.3 mmol) in ethanol/water (70 mL/7 mL) was hydrogenated over 10% palladium on carbon (0.41 g) at 55 psi of hydrogen, at 50° C., for 5 hours. The mixture was cooled, and the catalyst was removed by filtration. The solvent was evaporated in vacuo. The residue was dissolved in hot ethanol (30 mL) and treated with a saturated solution of hydrogen chloride in ethanol (3 mL). The product crystallized as the hydrochloride salt, 1.27 g (32%), a colorless solid. MS m/z 207 (MH+). 1H NMR (DMSO-d6) δ 1.92 (m, 3H), 2.43 (m, 1H), 3.28 (m, 2H), 4.31 (m, 1H), 6.77 (d, 2H), 7.47 (d, 2H), 9.44 (br s, 1H) and 10.75 (s, 1H). Anal. calcd for C11H14N2O2: C, 54.44; H, 6.23; N, 11.54. Found: C, 54.28; H, 6.06; N, 11.66.

1. temperatureThe mixture was cooled
2. customthe catalyst was removed by filtration
3. customThe solvent was evaporated in vacuo
4. dissolutionThe residue was dissolved in hot ethanol (30 mL)
5. additiontreated with a saturated solution of hydrogen chloride in ethanol (3 mL)
6. customThe product crystallized as the hydrochloride salt, 1.27 g (32%)