Diversification of Quinazolinones by Pd-Catalyzed C(sp)-Acetoxylation.

The quinazolinone ring has been exploited as a directing group for C(sp)-H functionalization for the first time. The proximal C-γ(sp)-H bonds have been oxidized by palladium-catalyzed acetoxylation reaction. Various functional groups on the quinazolinone scaffold were tolerated to provide novel quinazolinone derivatives. The use of base was found to be crucial for the monoselective acetoxylations.