Acetic Acid → HCID 68525181, compound

Participants

Reaction Steps

To a solution of (4-benzylpiperazin-1-yl){4-[5-(4-trifluoromethylbenzylamino)pyridin-2-yloxy]phenyl}methanone (5.40 g, 9.88 mmol) in methanol (150 mL) were added 37% aqueous formaldehyde (2.8 mL), sodium cyanoborohydride (1.86 g, 29.6 mmol) and acetic acid (1.7 mL) under ice cooling, and the resulting solution was stirred at room temperature for 2 hours. The solvent was evaporated under reduced pressure. Water was added to the residue, and this solution was neutralized with a saturated sodium bicarbonate solution, and extracted with chloroform. The organic layer was washed with water, and then dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was purified by silica gel column chromatography (chloroform:methanol=60:1). To the resulting product was then added a solution of 4 M hydrogen chloride in ethyl acetate until the resulting solution had a pH of 1. The precipitates were collected by filtration and recrystallized from ethanol (80 mL), to thereby yield 2.5 g of the title compound.

Provenance & Evidence