Methyl iodide → 3-(2,6-dichloro-3-nitro-phenyl)-1-methyl-1H-[1,6]naphthyridin-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-(2,6-dichloro-3-nitro-phenyl)-1H-[1,6]naphthyridin-2-one (2.0 g, 5.95 mmol) in DMF (50 mL) is added HNa (286 mg, 60%, 7.14 mmol) and IMe (0.5 mL, 8.03 mmol) at 0° C. The mixture is stirred for two hours at 0° C., diluted with EtOAc (300 ml) and washed with saturated K2CO3, brine and water. The organic layer is dried, filtered and concentrated to give crude product, which is purified by flash silica gel column elute with CH2Cl2 (100%) gradient to CH2Cl2/MeOH (2N NH3)(98.5/1.5) to give the titled intermediate as a solid (1.67 g, 80.3%).

Provenance & Evidence