Benzyl Bromide → HCID 22319086, compound

Participants

Reaction Conditions

Reaction Steps

718 mg of 3-bromo-5-(2-pyridyl)-1-(3-pyridyl)-1,2-dihydropyridin-2-one was dissolved in 40 ml of acetonitrile. 383 mg of benzyl bromide was added thereto, followed by stirring at 70° C. overnight. Further, 383 mg of benzyl bromide was added thereto, followed by stirring at 70° C. for 2 nights. After cooling to room temperature, the mixture was evaporated. The residue was dissolved in 30 ml of methanol, followed by cooling to 0° C. under stirring. 265 mg of sodium borohydride was added thereto, followed by stirring overnight under heating from 0° C. to room temperature. Water was added thereto, the solvent was evaporated, and then the residue was extracted with ethyl acetate. The organic layer was washed with brine and dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was purified by silica gel chromatography (hexane/ethyl acetate system), to give 550 mg of 3-bromo-5-(2-pyridyl)-1-(1-benzyl-1,2,3,6-tetrahydropyridin-5-yl)-1,2-dihydropyridin-2-one. 270 mg of the product was dissolved in 20 ml of dimethylformamide. 179 mg of 2-(2-cyanophenyl)-1,3,2-dioxaborinate, 313 mg of cesium carbonate and 15 mg of tetrakistriphenylphosphine palladium were added thereto, followed by stirring at 120° C. for 1 hour. After cooling to room temperature, water was added thereto, followed by extracting with ethyl acetate. The organic layer was washed with brine and dried over magnesium sulfate. The solvent was evaporated, and the residue was purified by silica gel chromatography (hexane/ethyl acetate system), to give 174 mg of the title compound.

Provenance & Evidence