Chemistry Letters, Vol.33, No.7, 922-923, 2004
Synthesis of aryl-substituted quinoline derivatives via Bronsted acid-catalyzed [4+2] aza Diels-Alder reaction
CF3SO3H-catalyzed [4+2] aza Diels-Alder reaction of aldimines with silyl enol ethers, and subsequent in situ oxidation furnished quinoline derivatives in good to excellent yields, wherein use of CF3SO3H as a Bronsted acid is critical for the cyclization reaction.