Acetic Acid → 2a-(4-(4-(1-Indanyl)-piperazin-1-yl)butyl)-2a,3,4,5-tetrahydro-1H-benz[cd]indol-2-one

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Reaction Steps

2a-(3-Formylpropyl)-2a,3,4,5-tetrahydro-1H-benz[cd]indol-2-one (210 mg, 0.90 mmol), 1-(1-indanyl)piperazine hydrochloride (270 mg, 1.0 mmol), acetic acid (540 mg, 9.0 mmol) and sodium triacetoxyborohydride (380 mg, 1.8 mmol) were stirred at room temperature for 20 hours in 1,2-dichloroethane (3 ml). The reaction solution was mixed with ethyl acetate (80 ml), washed with sodium hydroxide aqueous solution (1 N) and saturated brine and dried with anhydrous sodium sulfate, the solvent was removed by evaporation under a reduced pressure, and the thus obtained material was separated and purified by a silica gel column chromatography to obtain 430 mg (1.0 mmol, 100% in yield) of the title compound.

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