Acetic Acid → Ethyl 4-[(4-cyano-4-pyridin-2-ylpiperidin-1-yl)methyl]-1-oxo-1,8a-dihydronaphthalene-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

In a 10-20 mL Emrys™ process vial, a mixture of the ethyl 1-formyl-4-oxo-4H-quinolizine-3-carboxylate (684 mg, 2.79 mmol), 4-pyridin-2-ylpiperidine-4-carbonitrile (627 mg, 3.35 mmol), glacial acetic acid (0.96 mL, 16.7 mmol) and 4.1 mL of dichloroethane was stirred vigorously. To the stirring mixture was added resin-bound MP-cyanoborohydride (2.74 g, 5.58 mmol). The mixture was heated via Emrys Optimizer™ microwave to 120° C. for 30 minutes. Filtration and solvent removal provided material, which was subjected to silica gel chromatography eluting with 55-75% ethyl acetate in hexanes to provide ethyl 4-[(4-cyano-4-pyridin-2-ylpiperidin-1-yl)methyl]-1-oxo-1,8a-dihydronaphthalene-2-carboxylate.

Provenance & Evidence