反应详情

A solution of 3-(3-chlorophenyl)octahydro-1-benzofuran-2-ol (175 mg, 0.69 mmol) and tert-butyl 1-piperazinecarboxylate (128 mg, 0.69 mmol) in dichloroethane (3 mL) was treated with sodium trisacetoxyborohydride (220 mg, 1.04 mmol). The reaction was allowed to stir at room temperature for 16 h. The reaction was then diluted with methylene chloride and washed with a saturated aqueious solution of ammonium chloride (3 times). The organic layer was dried over magnesium sulfate and concentrated in vacuo and the product was purified via Biotage Horizon (FLASH 25 M, silica, gradient from 0% EtOAc/hexane to 30% EtOAc/hexane). This material was dissolved in methanol (0.5 mL) and treated with a saturated methanolic solution of hydrochloric acid (0.5 mL) followed by diethyl ether. After crystallizing in the refrigerator for 16 h, the resulting solid was collected, washed with diethyl ether and dried in vacuo to yield 250 mg (83%) 2-[1-(3-chlorophenyl)-2-piperazin-1-ylethyl]cyclohexanol dihydrochloride as a white solid. HRMS: calcd for C18H27ClN2O+H, 323.18901; found (ESI, [M+H]+), 323.1891.

1. washwashed with a saturated aqueious solution of ammonium chloride (3 times)
2. dry with materialThe organic layer was dried over magnesium sulfate
3. concentrationconcentrated in vacuo
4. customthe product was purified via Biotage Horizon (FLASH 25 M, silica, gradient from 0% EtOAc/hexane to 30% EtOAc/hexane)
5. dissolutionThis material was dissolved in methanol (0.5 mL)
6. additiontreated with a saturated methanolic solution of hydrochloric acid (0.5 mL)
7. customAfter crystallizing in the refrigerator for 16 h
8. customthe resulting solid was collected
9. washwashed with diethyl ether
10. customdried in vacuo