Acetic Acid → HCID 178476627, compound

Participants

Reaction Steps

A mixture of cis-3-(3-aminophenyl)-1-[4-(4-methylpiperazino)cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine (0.107 g, 0.263 mmol, 1 equiv), glacial acetic acid (0.06 mL, 1.0 mmol, 3.8 equiv), benzo[B]furan-2-carboxaldehyde (0.1 g, 0.3 mmol, 1 equiv), sodium triacetoxyborohydride (0.212 g, 1.0 mmol, 3.8 equiv), and dichloroethane (2 mL) was stirred at ambient temperature for 4.5 h. Aqueous sodium bicarbonate was added, the organic layer was separated, and the aqueous layer was extracted with two portions of CH2Cl2 (10 mL each). The combined organic extracts were dried over MgSO4, filtered, and concentrated to afford a yellow oil which was purified by preparative RP-HPLC (Rainin C18, 8 μm, 300 Å, 25 cm; 10%-60% acetonitrile-0.1M ammonium acetate over 20 min, 21 mL/min). The acetonitrile was removed in vacuo and the aqueous mixture was lyopholyzed to give cis-3-{3-[(benzo[b]furan-2-ylmethyl)amino]phenyl}-1-[4-(4-methylpiperazino)cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine monoacetate salt as a white solid (0.017 g, 0.031 mmol): 1H NMR (d6 DMSO, 400 MHz): δH 8.22 (1H, s), 7.51-7.58 (2H, m), 7.22-7.28 (3H, m), 6.98 (1H, s), 6.79-6.84 (2H, m), 6.59-6.62 (1H, m), 4.76-4.81 (1H, m), 4.50 (2H, d, J=5.6 Hz), 2.19-2.24 (14H, m), 2.05-2.07 (2H, m), 1.91 (3H, s), 1.60-1.75 (4H, m); RP-HPLC (Delta Pak C18, 5 μm, 300 Å, 15 cm; 5%-85% acetonitrile-0.1M ammonium acetate over 20 min, 1 mL/min) Rt 13.99 min. MS: MH+ 537.

Provenance & Evidence