Site-Selective C-H Functionalization of Arenes Enabled by Noncovalent Interactions
Adolfo Fernández-Figueiras1, Martin A Ravutsov1, Svilen P Simeonov1,2
1Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev St., bl. 9, 1113 Sofia, Bulgaria.
Metal-catalyzed C-H functionalization of arenes is challenging due to similar C-H bond energies. New strategies utilize noncovalent forces for regioselective functionalization, overcoming limitations of traditional directing groups.
Area of Science:
- Organic Chemistry
- Catalysis
- Synthetic Methodology
Background:
- Direct metal-catalyzed C-H functionalization is key for synthesizing complex molecules.
- Regioselective C-H functionalization is difficult due to the narrow energy range of C-H bonds.
- Covalently bound directing groups are effective but require extra steps for installation and removal.
Purpose of the Study:
- To review the evolution of regioselective metal-catalyzed distal C-H functionalization of arenes.
- To highlight recent advances in strategies employing noncovalent forces.
- To provide a chronological overview of developments over the past decade.
Main Methods:
- Review of literature on metal-catalyzed C-H functionalization.
- Focus on strategies employing noncovalent directing interactions (hydrogen bonds, Lewis acid-base, ionic forces).
- Chronological analysis of research advancements.
Main Results:
- Noncovalent strategies offer efficient alternatives to traditional directing groups.
- These methods enable regioselective C-H functionalization without requiring covalent modification.
- Significant progress has been made in developing these groundbreaking strategies.
Conclusions:
- Metal-catalyzed C-H functionalization has advanced significantly with noncovalent approaches.
- These strategies overcome the limitations of substrate pre-functionalization.
- The field is rapidly evolving, offering powerful new synthetic tools.
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