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DOI: 10.1055/s-0034-1380182
Recent Developments in the Synthesis of Imidazo[1,2-a]pyridines
Publikationsverlauf
Received: 04. November 2014
Accepted after revision: 27. November 2014
Publikationsdatum:
26. Februar 2015 (online)
![](https://www.thieme-connect.de/media/synthesis/201507/lookinside/thumbnails/10.1055-s-0034-1380182-1.jpg)
Abstract
Advances in the last decade for the synthesis of the imidazo[1,2-a]pyridine scaffold from various substrates employing approaches such as multicomponent reactions, tandem processes, rearrangement reactions, inter- and intramolecular oxidative/reductive cyclizations, and transition-metal-catalyzed C–H activation are summarized in this review. The mechanisms for the selected transformations are also discussed.
1 Introduction
2 From 2-Aminopyridines
2.1 Revisiting Traditional Cyclocondensation
2.1.1 Regioselectivity in Cyclocondensation
2.2 Reactions of Carbonyl Compounds
2.3 Reactions of α,β-Unsaturated Carbonyl Compounds
2.4 Reactions of Nitroolefins
2.5 Reactions of Alkynes
2.6 Multicomponent Reactions
2.6.1 Three-Component Reaction of Aldehyde, 2-Aminopyridine, and Isocyanide
2.6.2 Three-Component Reaction of 2-Aminopyridine, Aldehyde, and Alkyne
2.6.3 Other Multicomponent Procedures
2.7 Reactions of N-Substituted 2-Aminopyridines
2.8 Miscellaneous Reactions
3 From Pyridines
3.1 Multicomponent Reactions
4 From Pyridinium Salts
5 From Imidazoles
5.1 Reactions of Heterocyclic Ketene Aminals
6 Miscellaneous Methods
7 Conclusion
-
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