Fig. 1: Strategies for selective meta-C–H functionalization.
From: Rapid and scalable ruthenium catalyzed meta-C–H alkylation enabled by resonant acoustic mixing

a meta-C–H functionalization by conventional catalysis. b Ru-catalyzed meta-C–H alkylation by thermal and photocatalysis. c Our current work on meta-C–H alkylation by resonant mixing.