Sodium triacetoxyborohydride → HCID 68993740, compound

Participants

Reaction Steps

To cis-2-{[(3RS,5SR)-5-(methyloxy)-3-piperidinyl]methyl}-1H-isoindole-1,3(2H)-dione (125 mg, 0.43 mmol) in MeOH (1 ml) and CHCl3 (5 ml) was added [6-(methyloxy)-3-oxopyrido[2,3-b]pyrazin-4(3H)-yl]acetaldehyde (for a preparation see Example 126(e)) (100 mg; 0.50 mmol) and the reaction was allowed to stir at room temperature under N2 for 4 hours. Na(OAc)3BH (210 mg; 1.0 mmol) was added and the reaction was allowed to stir at room temperature under nitrogen for an additional 14 hours. The reaction was partitioned between saturated aqueous NaHCO3 (5 mL) and CH2Cl2 (20 mL), the aqueous layer was further extracted with CH2Cl2 (20 mL), and the combined organic layers were dried over Na2SO4. The solvents were removed and the crude residue was purified by chromatography on silica gel using a 0-10% MeOH/DCM gradient to provide the desired compound (10 mg; 55%) as a colorless oil.

Provenance & Evidence