Azobisisobutyronitrile → HCID 68799492, compound

Participants

Reaction Steps

A mixture of 7-bromo-1-(2,6-difluorobenzyl)-1,4-dihydro-6-methyl-4-oxoquinoline-3-carboxylic acid ethyl ester (3.5 g, 8 mmol), prepared according to the procedure outlined in PCT application WO97/14682, Reference Example 3, NBS (1.5 g, 8.4 mmol) and 2,2′-azobisisobutyronitrile (AIBN, 100 mg) in DCM (200 mL) was stirred at reflux for 4 h. Additional NBS (750 mg) was added and the mixture was refluxed for 4 h. Column chromatography (hexanes:ethyl acetate=3:7) yielded the product as a white solid.

Provenance & Evidence