Ketene Dithioacetals in the Aza-Diels−Alder Reaction with <i>N</i>-Arylimines: A Versatile Approach to Tetrahydroquinolines, 2,3-Dihydro-4-quinolones, and 4-Quinolones
作者:Dai Cheng、Jinglan Zhou、Eddine Saiah、Graham Beaton
DOI:10.1021/ol020179d
日期:2002.12.1
[GRAPHICS]The first successful use of ketene dithioacetals as dienophiles in the aza-Diels-Alder reaction with N-arylimines is described. Among the ketene dithioacetals tested, 1,4-benzodithlafulvenes are most effective in assembling the tetrahydroquinoline core. Subsequent chemical manipulations provide a concise and divergent approach to the synthesis of 2,3-tetrahydroquinolines, 2,3-dihydro-4-quinolones, and 4-quinolones.