Sodium Chloride → HCID 19434868, compound

Participants

Reaction Steps

505 mg (1.29 mmol) of 5-amino-6,8-difluoro-2-(3-fluoro-4-pivaloylaminophenyl)-4H-1-benzopyran-4-one obtained in Example 66 was dissolved in 15 ml of dimethylformamide under argon atmosphere, 156 mg of sodium hydride (60% oil dispersion) and 0.42 ml of 1-iodoheptane were added under ice-cooling and the mixture was stirred for 2 hours. An aqueous saturated solution of sodium chloride was added to the reaction solution and the mixture was extracted twice with ethyl acetate. The organic layer was washed with an aqueous saturated solution of sodium chloride and dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=5:1) to give 460 mg (73%) of 6,8-difluoro-2-(3-fluoro-4-pivaloylaminophenyl)-5-heptylamino-4H-1-benzopyran-4-one.

Provenance & Evidence