HCID 68480254, compound → (S)-Pyrrolidine-2-carboxylic acid (4-hydroxy-phenyl)-amide

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Reaction Steps

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.

Provenance & Evidence