Acetic Acid → HCID 57813396, compound

Participants

Reaction Steps

N-{[1,6-Diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}-N′-{[3′-formyl-4-(methyloxy)-3-biphenylyl]methyl}-1,3-benzenedicarboxamide (54 mg, 0.00008 mol) in DCM, 1,1-dimethylethyl hexahydro-1H-1,4-diazepine-1-carboxylate (24 mg, 0.00012 mol) and sodium triacetoxyborohydride (34 mg., 0.00016 mol) and AcOH (6 uL) were agitated overnight on a shaker. LC-MS was used to monitor the reaction. The reaction was quenched with sat. aq. NaHCO3, then extracted with DCM (2×). Combined organic extracts were washed with sat. aq. NaCl and dried (Na2SO4) and concentrated to a residue. The residue was taken up in DCM (10 mL) containing 25% TFA and allowed to stand at room temperature for 3 h. LC-MS showed the reaction to be complete. Solvent was stripped off. Purification was carried out on Gilson instrument with acetonitrile-water (0.1% TFA) gradient; C18-RP column. Fractions containing the clean desired product were combined; diluted with EtOAc; washed with sat. aq. NaHCO3; aq. phase was back-extracted with EtOAc. Combined organic extracts were washed with sat. aq. NaCl and dried (Na2SO4) and concentrated to a residue. It was taken up in a small amount of DCM and transferred to a vial and pumped down to afford the title compound as a chalky white solid [36.6 mg (60%)]. LC-MS m/z 760 (M+H)+.

Provenance & Evidence