Hydrochloric Acid → HCID 58815887, compound

Participants

Reaction Steps

To a solution of 1-{3-[(R)-((2S,5R)-4-benzyl-2,5-dimethyl-piperazin-1-yl)-(3-hydroxy-phenyl)-methyl]-benzoyl}-piperidine-4-carboxylic acid ethyl ester (365 mg, Example 122) in THF (4 mL) was added 1N NaOH solution (3 mL). The reaction was stirred at room temperature overnight. The reaction solution was neutralized by the addition of 1 N HCl solution (3 mL). The resulting solution was concentrated under vacuum to give crude product, which was subjected to reverse phase C-18 column chromatography conducted on CombiFlash™ Sq 16×(gradient: 100% H2O to 100% MeOH) to give 1-{3-[(R)-((2S,5R)-4-benzyl-2,5-dimethyl-piperazin-1-yl)-(3-hydroxy-phenyl)-methyl]-benzoyl}-piperidine-4-carboxylic acid (228 mg; 66%). 1H NMR (300 MHz, CD3OD) δ 7.49 (m, 2H), 7.38 (m, 6H), 7.28 (m, 1H), 7.18 (dd, J=8.0, 8.0 Hz, 1H), 6.73 (m, 2H), 6.67 (s, 1H), 5.26 (s, 1H), 4.48 (m, 1H), 4.27 (d, J=13.0 Hz, 1H), 3.66 (m, 2H), 3.13 (m, 1H), 3.01 (m, 2H), 2.85 (m, 2H), 2.68 (m, 1H), 2.49 (m, 2H), 2.13 (dd, J=10.5, 10.5 Hz, 1H), 2.00 (m, 1H), 1.82 (m, 1H), 1.65 (m, 2H), 1.28 (d, J=6.5 Hz, 3H), 1.17 (d, J=6.0 Hz, 3H).

Provenance & Evidence