Acetic Acid → N-{[1,6-Diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}-N'-[(6-methyl-3'-{[(2S)-2-methyl-1-piperazinyl]methyl}-3-biphenylyl)methyl]-2,6-pyridinedicarboxamide

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Reaction Steps

N-{[1,6-Diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}-N′-[(3′-formyl-6-methyl-3-biphenylyl)methyl]-2,6-pyridinedicarboxamide (39.0 mg. 0.059 mmol) was diluted in DMSO (1.5 mL) and dispensed into a 1 dram vial containing 1,1-dimethylethyl (3S)-3-methyl-1-piperazinecarboxylate (0.177 mmol, 3.0 eq) and acetic acid (3.55 mg, 0.059 mmol) and fitted magnetic stir bar. The result solution was stirring at room temperature for 4 h. MP-B(OAc)3H (0.591 mmol, 138 mg, 10.0 eq) was added and the solution was stirred for another 12 h. The polymer reagent was filtered off and MeOH (2.0 mL) and 1 drop of concentrated HCl was added to the solution. The solution was heated at 60° C.° for 12 h. Purification was completed via a Gilson HPLC (acidic conditions). The product was dissolved in 3 mL of MeOH and passed through 0.5 g amine columns (washed with 8 mL MeOH) to afford 14.5 mg (33.03%) of the title compound. LC-MS m/z 744 (M+H)+, 1.43 min (ret time).

Provenance & Evidence