THE O-AMINO-TRIFLUOROMETHYL FUNCTIONALITY AS A NOVEL SYNTHON FOR 4-FLUOROQUINOLINES

2-Substituted 4-fluoroquinolines 3 are obtained by the reaction of 2-(trifluoromethyl)aniline (1) with lithium enolates 2 derived from methylketones. A similar reaction of 1 with lithium enolate of acetaldehyde produces 4-fluoroquinoline. 1-Fluoro-3-phenyl-4,6-phenanthroline (18) is obtained by treatment of Lithium enolate of acetophenone with 4-(trifluoromethyl)quinolin-3-amine (17). By contrast, (Z)-N-[2-(1-fluoroalkenyl)phenyl]carboxamides 10 and 12 are the products of the reaction of 1 with the respective enolate ions derived from 3-pentanone and isobutyl phenyl ketone. A unified mechanism for the formation of quinolines and carboxamides is proposed.