反应详情

To a mixture of the 1-(2-cycloheptylphenyl)piperazine (25 mg, 0.0967 mmol) produced in Example (44c) and tetrahydrofuran (1 mL) were added butyraldehyde (0.011 mL, 0.126 mmol), sodium triacetoxyborohydride (26.6 mg, 0.126 mmol) and acetic acid (0.011 mL, 0.183 mmol), and the mixture was stirred for 19 hours and 30 minutes at room temperature. Saturated aqueous solution of sodium hydrogencarbonate was added to the reaction mixture and extraction was performed three times with ethyl acetate. The obtained organic layers were concentrated. The resultant residue was purified by NH silica gel column chromatography (ethyl acetate/heptane) to give 26.7 mg of 1-butyl-4-(2-cycloheptylphenyl)piperazine as a colorless oil.

1. concentrationThe obtained organic layers were concentrated
2. customThe resultant residue was purified by NH silica gel column chromatography (ethyl acetate/heptane)