Water → HCID 178483346, compound

Participants

Reaction Steps

To a stirred solution of 6-[trans-4-(3-phenylpropylamino)cyclohexyl]-3H-benzoxazol-2-one (263 mg, 0.750 mmol) in MeOH (10 mL) was added H2O (0.5 mL) and p-formaldehyde (113 mg, 3.75 mmol). After stirring the reaction mixture for 3 hours, NaBH(OAc)3 was added, and stirring was continued for 12 hours. Solid NaOH was added to give a clear solution, which was then concentrated under reduced pressure. Purification by flash chromatography (silica, 95:4:1 CH2Cl2:MeOH:NH4OH) gave 6-{trans-4-[methyl(3-phenylpropyl)-amino]cyclohexyl}-3H-benzoxazol-2-one (160 mg, 59%), as a white solid: mp 58-62° C.; IR (KBr): 2929, 1774 cm−1; 1H NMR (500 MHz, DMSO-d6): δ 8.97 (br s, 1H), 7.26-7.12 (m, 6H), 6.99-6.98 (m, 2H), 2.63 (m, 2H), 2.57 (t, J=7 Hz, 2H), 2.56 (m, 1H), 2.38 (m, 2H), 2.18 (s, 3H), 1.78 (m, 2H), 1.68 (m, 2H), 1.37 (m, 2H), 1.27 (m, 2H); CI-MS (methane) (m/z): 365 [M+H]+; HRMS-API (m/z): [M+H]+ calcd for C23H28N2O2, 365.2229; found, 365.2231; HPLC: method A, 5.95 minutes (95.3%); method B, 10.12 minutes (97.6%); Anal. Calcd for C23H28N2O2.0.25H2O: C, 74.87; H, 7.79; N, 7.59. Found: C, 74.77; H, 7.71; N, 7.81.

Provenance & Evidence