反应详情

2-(4-Chlorophenoxy)aniline (137 mg, 0.6237 mmol, 1.1 eq) and 1-acetyl-N-(3-acetylphenyl)piperidine-4-carboxamide (160 mg, 0.5549 mmol, 1 eq) were stirred in dry dichloromethane (DCM) at room temperature for 10 min. Tri-isopropoxytitanium chloride (295 μL, 1.2351 mmol, 2.2 eq) was added to the reaction mixture which was stirred at room temperature for an additional 10 min. Sodium triacetoxyborohydride (590 mg, 2.7838 mmol, 5 eq) and acetic acid (3 drops) were added to the reaction mixture which was stirred at room temperature for 16 h. The reaction mixture was then poured onto a solution of saturated aqueous sodium bicarbonate (100 mL) and extracted with DCM (80 mL). The organic layer was washed with brine (100 mL), dried over MgSO4, filtered and concentrated to give the crude as a yellow oil. Purification of the crude by flash chromatography (ISCO) eluting with a gradient [from 100% petroleum ether (PE) to 100% EtOAc] gave the title compound (48 mg, 18%) as a clear oil.

1. stirringwas stirred at room temperature for 16 h
2. extractionextracted with DCM (80 mL)
3. washThe organic layer was washed with brine (100 mL)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto give the crude as a yellow oil
8. customPurification of the crude by flash chromatography (ISCO)
9. washeluting with a gradient [from 100% petroleum ether (PE) to 100% EtOAc]