Synthesis 2009(13): 2117-2142  
DOI: 10.1055/s-0029-1217389
REVIEW
© Georg Thieme Verlag Stuttgart ˙ New York

Recent Advances in the Aza-Claisen Rearrangement

K. C. Majumdar*, Trijit Bhattacharyya, Buddhadeb Chattopadhyay, Biswajit Sinha
Department of Chemistry, University of Kalyani, Kalyani 741235, West Bengal, India
Fax: +91(33)25828282; e-Mail: kcm_ku@yahoo.co.in;
Further Information

Publication History

Received 6 March 2009
Publication Date:
08 June 2009 (online)

Abstract

This brief review article describes developments in the aza-Claisen rearrangement over the last nine years. In this article, the emphasis has been given to the various aspects of the aza-Claisen­ rearrangement, especially metal-mediated stereoselective transformation, zwitterionic aza-Claisen rearrangement and microwave-assisted aza-Claisen rearrangement.

1 Introduction

2 Definition and Overview

3 Thermal Aza-Claisen Rearrangement

4 Catalysis of the Aza-Claisen Rearrangement

4.1 Catalysis by Boron Reagents

4.2 Catalysis by Palladium Reagents

4.3 Catalysis by Gold Salts

4.4 Catalysis by Ruthenium Salts

4.5 Catalysis by Zinc(II) Chloride

5 Zwitterionic Aza-Claisen Rearrangement

6 Microwave-Assisted Aza-Claisen Rearrangement

7 Miscellaneous

8 Conclusions

14

Armstrong, P. L.; Hewson, A. T. unpublished observations.

49

Catalysts of combination PdCl2(diphosphine) are inactive, while catalysts prepared from the reaction of diphosphines (1 equiv) with Pd(MeCN)4(BF4)2 promoted elimination of allylic imidates.

77

See reference 70.