4-Methylmorpholine → 7-chloro-1-{1-[(5'-fluoro-2'-{[(1R)-3-hydroxy-1-methylpropyl]oxy}-3-methylbiphenyl-4-yl)carbonyl]piperidin-4-yl}-3,3-dimethyl-3,4-dihydro-1,5-naphthyridin-2(1H)-one

Participants

Reaction Steps

To a methanol-tetrahydrofuran (1:1) mixed solvent solution (20.0 ml) of 5′-fluoro-2′-{[(1R)-3-hydroxy-1-methylpropyl]oxy}-3-methylbiphenyl-4-carboxylic acid (637 mg) and 7-chloro-3,3-dimethyl-1-piperidin-4-yl-3,4-dihydro-1,5-naphthyridin-2(1H)-one trifluoroacetate (Reference Example 10) (876 mg) were added at room temperature N-methylmorpholine (0.660 ml) and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (940 mg), followed by stirring for 1 hour. The reaction solution was diluted with methylene chloride, then washed sequentially with water and saturated sodium chloride solution, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography to afford 7-chloro-1-{1-[(5′-fluoro-2′-{[(1R)-3-hydroxy-1-methylpropyl]oxy}-3-methylbiphenyl-4-yl)carbonyl]piperidin-4-yl}-3,3-dimethyl-3,4-dihydro-1,5-naphthyridin-2(1H)-one (820 mg).

Provenance & Evidence