Formaldehyde → 1,1-dimethylethyl 4-{[3-({[(3'-{[(3S)-3,4-dimethyl-1-piperazinyl]methyl}-6-fluoro-3-biphenylyl)methyl]amino}carbonyl)phenyl]methyl)-1-piperidinecarboxylate

Participants

Reaction Steps

To a solution of 1,1-dimethylethyl 4-{[3-({[(6-fluoro-3′-{[(3S)-3-methyl-1-piperazinyl]methyl}-3-biphenylyl)methyl]amino}carbonyl)phenyl]methyl}-1-piperidinecarboxylate (130 mg, 0.21 mmol) in MeOH (5 mL) was added formaldehyde (37% in water, 69 mg, 0.85 mmol). After 30 minutes stirring at rt, sodium borohydride (16 mg, 0.42 mmol) was added. After stirring at rt for additional 3 hours, the solvent was removed to give a residue which was purified by loading onto a 2 g aminopropyl SPE cartridge and eluting sequentially with DCM (3×5 mL), EtOAc (3×5 mL), and MeOH (3×5 mL). The dichloromethane and ethyl acetate fractions were combined and evaporated to give the title compound (130 mg, 99%). LC/MS: m/z, 629 (M+H), 1.97 min.

Provenance & Evidence