反应详情

Condensation of 6-(trans-4-[3-(3,4-difluorophenyl)propylamino]-cyclohexyl}-3H-benzoxazol-2-one (400 mg, 1.0 mmol) with p-formaldehyde (740 mg, 24.7 mmol) following the procedure described in Example 17, except CH2Cl2 (15 mL) was also added, followed by formation of the HCl salt, gave 6-(trans-4-{[3-(3,4-difluorophenyl)propyl]methylamino}cyclohexyl)-3H-benzoxazol-2-one (226 mg, 52%), as a white solid: mp 224-227° C.; IR (KBr): 2945, 1764 cm−1; 1H NMR (500 MHz, DMSO-d6):, δ 11.50 (s, 1H), 9.94 (s, 1H), 7.40-7.34 (m, 2H), 7.16 (s, 1H), 7.12-7.09 (m, 1H), 7.00 (s, 2H), 3.33-3.29 (m, 1H), 3.18-3.11 (m, 1H), 3.03-2.97 (m, 1H), 2.71 (d, J=5 Hz, 3H), 2.68-2.63 (m, 2H), 2.59-2.50 (m, 1H), 2.14-1.98 (m, 4H), 1.94-1.88 (m, 2H), 1.66-1.51 (m, 4H); ESI-MS (m/z): 401 [M+H]+; HPLC: method A, 5.97 minutes (97.1%); Anal. Calcd for C23H26F2N2O2.HCl: C, 63.23; H, 6.23; N, 6.41. Found: C, 62.94; H, 6.56; N, 6.32.

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