Recent Developments in the Synthesis of Imidazo[1,2-a]pyridines

Kasiviswanadharaju Pericherla; Pinku Kaswan; Khima Pandey; Anil Kumar

doi:10.1055/s-0034-1380182

Synthesis, Table of Contents

Synthesis 2015; 47(07): 887-912
DOI: 10.1055/s-0034-1380182

review

Recent Developments in the Synthesis of Imidazo[1,2-a]pyridines

Authors

Kasiviswanadharaju Pericherla

Department of Chemistry, Birla Institute of Technology and Science, Pilani 333031, Rajasthan, India Email: anilkumar@pilani.bits-pilani.ac.in
Pinku Kaswan

Department of Chemistry, Birla Institute of Technology and Science, Pilani 333031, Rajasthan, India Email: anilkumar@pilani.bits-pilani.ac.in
Khima Pandey

Department of Chemistry, Birla Institute of Technology and Science, Pilani 333031, Rajasthan, India Email: anilkumar@pilani.bits-pilani.ac.in
Anil Kumar*

Department of Chemistry, Birla Institute of Technology and Science, Pilani 333031, Rajasthan, India Email: anilkumar@pilani.bits-pilani.ac.in

Abstract

All articles of this category

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

Key words

imidazo[1,2-a]pyridine - 2-aminopyridine - tandem reaction - multicomponent reaction - C–H activation

Full Text

References

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