Water → HCID 19434889, compound

Participants

Reaction Conditions

Reaction Steps

177 mg (0.38 mmol) of the resulting 5-(3-chloropropylamino)-6,8-difluoro-2-(3-fluoro-4-pivaloylaminophenyl)-4H-1-benzopyran-4-one was dissolved in 10 ml of dimethylformamide under argon atmosphere, 124 mg of sodium azide was added and the mixture was stirred at 70° C. for 18 hours. Water was added to the reaction solution, and the precipitated crystals were collected by filtration and purified by silica gel column chromatography (n-hexane:ethyl acetate=4:1) to give 179 mg (100%) of 5-(3-azidopropylamino)-6,8-difluoro-2-(3-fluoro-4-pivaloylaminophenyl)-4H-1-benzopyran-4-one.

Provenance & Evidence