A general synthetic approach, capable of accessing a diverse range of 3,3-disubstituted
quinoline-2,4-diones and 1,8-naphthyridine-2,4-diones via titanium tetrachloride catalyzed
C-acylation of silyl ketene acetals is described. The suggested methodological platform
is surveyed using different reaction conditions and is applied to the total syntheses
of 3,3-diisopentenyl-N-methylquinoline-2,4-dione and 3-demethyl-N-methylatanine.
Lewis acids - fused-ring systems - aldol reactions - quinolines - natural products