Maleic Acid → 1-[1-(4-piperidyl)-4-piperidyl]-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine, trimaleate salt

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Reaction Steps

1-[1-(4-piperidyl)-4-piperidyl]-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (108 mg, 0.230 mmol) was dissolved in 25 ml of ethanol and maleic acid (80 mg, 0.690 mmol) in 5 ml of hot ethanol was added. After 2 hours at room temperature, the solid was filtered and dried to give 155 mg of 1-[1-(4-piperidyl)-4-piperidyl]-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine, trimaleate salt. 1H NMR (DMSO) 1.80 (m, 2H), 2.42 (m, 4), 2.51 (m, 2H), 2.95 (m, 3H), 3.44 (bm, 7H), 5.06 (m, 1H), 6.10 (s, 6H), 7.15 (m, 5H), 7.45 (m, 2H), 7.67 (d, J=8.5 Hz, 2H), 8.27 (s, 1H); LC/MS (MH+32 484).

Provenance & Evidence