Journal
CHEMICAL RECORD
Volume 22, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/tcr.202100171
Keywords
annulation; C-H activation; heterocycles; native; transition metals
Categories
Funding
- DAV University, Jalandhar
- CSIR [MLP0203]
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Directing groups are widely used for transition metal-catalyzed direct C-H bond functionalization, with recent advancements in utilizing free amine, hydroxyl and sulfhydryl as directing groups for the synthesis of heterocycles.
Transition metal-catalyzed direct C-H bond functionalization is recognized as an efficient strategy to assemble heterocyclic frameworks. For this purpose, directing groups (DGs) installation on an organic molecule has remained a widely exploited strategy for the years. The installation of directing groups, especially for the amine, alcohol and thiol containing reactants and their removal after the reaction need additional steps. In this regard, the use of free amine, hydroxyl and sulfhydryl as directing groups in native form is advantageous and in recent times, these transformations have stirred undisputable advancements for applications to heterocycle synthesis. In this review, the aromatic sp(2)-C attached free amine, hydroxyl and sulfhydryl as native functionalities are shown to be useful for the construction of five to seven-membered N-, O- and S-heterocycles.
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