Synlett 2024; 35(20): 2289-2296
DOI: 10.1055/a-2384-6583
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Special Issue to Celebrate the 75th Birthday of Prof. B. C. Ranu

Skeletal Reorganization: Approaches towards the Synthesis of Aza-Heterocyclic Cores

Dwaipayan Das
,
Rahul Dev Mandal
,
Prasun Mukherjee
,
Pranabes Bhattacharya
,
Asish R. Das
We acknowledge the financial support from the University of Calcutta. R.D.M. thanks the Council of Scientific and Industrial Research (CSIR), India for Senior Research Fellowship (file no.:09/028(1056)/2018-EMR-I).


Dedicated to Prof. Brindaban C. Ranu on the occasion of his 75th birth anniversary

Abstract

The impetuous development of the pharmaceutical industry and material science stimulates the search for new synthetic approaches and new methods for the synthesis and functionalization of aza-heterocycles; these are some of the key objectives of modern organic chemistry. As a result, an advanced method towards the synthesis of functionalized N-heterocycles that circumvents the limitations associated with traditional methods needs to be devised. In recent decades, rearrangement/reorganization reactions have emerged as a powerful tool for the efficient synthesis of the aza-heterocycle. In this illustration, we summarize some our recent efforts in the development of few complex aza-heterocyclic cores.

1 Introduction

2 Skeletal Rearrangement of Small Heterocycles via Domino Ring-Opening and Ring-Closing (DROC) Strategy

3 Ru(II)-Catalyzed Skeletal Rearrangement of the Quinazoline Ring

4 Lewis Acid Catalyzed Skeletal Rearrangement of Furans to Indolizine Cores

5 Skeletal Rearrangement of Donor–Acceptor Cyclopropanes via Domino Ring-Opening and Ring-Closing (DROC) Strategy

6 Lewis Acid Mediated Skeletal Rearrangement of Donor–Acceptor Spirocyclopropylpyrazolones

7 Skeletal Rearrangement through Ring Distortion Strategy

8 Conclusion



Publication History

Received: 29 June 2024

Accepted after revision: 12 August 2024

Accepted Manuscript online:
12 August 2024

Article published online:
12 September 2024

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