4-Bromo-2-fluoroaniline → Jtp-70902

Participants

Reaction Conditions

Reaction Steps

To toluene-4-sulfonic acid 3-cyclopropyl-1-(3-methanesulfonylaminophenyl)-8-methyl-2,4,7-trioxo-1,2,3,4,7,8-hexahydropyrido[2,3-d]pyrimidin-5-yl ester 15 (3.5 g) obtained in Step 8 was added 2-fluoro-4-bromoaniline 16 (23 g), and the mixture was stirred under heating at 135° C. for 3 hrs. The reaction mixture was purified by column chromatography (chloroform:acetone=9:1) to give N-{3-[5-(4-bromo-2-fluoro-phenylamino)-3-cyclopropyl-8-methyl-2,4,7-trioxo-3,4,7,8-tetrahydro-2H-pyrido[2,3-d]pyrimidin-1-yl]phenyl}-methanesulfonamide 17 (3.0 g, 83%) as a white solid.

Provenance & Evidence