A copper/silver co-catalyzed cross-dehydrogenative coupling reaction is developed
to achieve exclusively remote C5–H coupling of 8-aminoquinoline amides with the methylenic
sp3 C–H bond of 1,3-dicarbonyl compounds. This protocol provides a highly regioselective
synthetic route for the functionalization of 8-aminoquinoline amides at C5 under mild
conditions. Preliminary experiments reveal that radicals may be involved in this catalytic
transformation.
Key words
copper - silver - 8-aminoquinoline amides - 1,3-dicarbonyl compounds - C5–H functionalization