Acetic Acid → HCID 178476634, compound

Participants

Reaction Steps

A mixture of 3-(4-amino-3-chlorophenyl)-1-[4-(4-methylpiperazino)cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine (0.200 g, 0.00045 mol) in 1,2-dichloroethane (20 mL) was reacted with 2-chloro-6-fluorobenzaldehyde (0.076 g, 0.00048 mol), acetic acid (0.095 g, 0.00159 mol) and sodium triacetoxyborohydride (0.336 g, 0.00159 mol) at ambient temperature. An additional three equivalents of sodium triacetoxyborohydride (1.008 g, 0.00477 mol) were added in three 24 hour intervals, after which time all the starting material had been consumed. The solvents were removed in vacuo and the residue was partitioned between chloroform (25 mL) and saturated aqueous sodium bicarbonate (50 mL). The phases were separated and the aqueous phase was extracted with chloroform (2×25 mL). The combined organic phases were dried over magnesium sulfate, and the solvent was removed in vacuo. The residue was purified by preparative RP-HPLC (Rainin C18, 8 μm, 300 A, 25 cm; 30% isocratic for five minutes, then 30%-60% acetonitrile-0.1M ammonium acetate over 15 min, 21 ml/min). The acetonitrile was removed in vacuo and the aqueous mixture was lyopholyzed to give to give trans 3-{3-chloro-4-[(2-chloro-6-fluorobenzyl)amino]phenyl}-1-[4-(4-methylpiperazino)cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine acetate as a white solid (0.074 g, 0.00011 mol):

Provenance & Evidence