Abstract
C–H activation of functionally rich molecules without the need for directing groups promises shorter organic syntheses and late-stage diversification of molecules for drug discovery. We highlight recent examples of palladium-catalyzed nondirected functionalization of C–H bonds in arenes as limiting substrates with a focus on the development of the concept of spatial anion control for direct C–H arylation.
1 C–H Activation and the CMD Mechanism
2 Nondirected C–H Functionalizations of Arenes as Limiting Substrates
3 Nondirected C–H Arylation
4 Spatial Anion Control for Direct C–H Arylation
5 Coordination Chemistry with Spatial Anion Control
6 Conclusion
Key words
C–H activation - concerted metalation-deprotonation - CMD - C–H arylation - spatial anion control - palladium