Synthesis 2008(2): 161-184  
DOI: 10.1055/s-2007-1000848
REVIEW
© Georg Thieme Verlag Stuttgart · New York

Reaction of Linear Push-Pull Enamines at the β′-Position

Aleksandr N. Kostyuk*, Dmitriy M. Volochnyuk, Dmitriy A. Sibgatulin
Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska 5, Kyiv-94 02094, Ukraine
Fax: +380(44)5373253; e-Mail: a.kostyuk@enamine.net;
Further Information

Publication History

Received 30 July 2007
Publication Date:
18 December 2007 (online)

Abstract

Enamine tautomerism is often the main cause of regio­selectivity problems in the chemistry of enamines derived from ­ketones. Linear push-pull tertiary enamines featuring a methyl ­(methylene) group at the α-position do not experience such tau­to­merism; nevertheless, a number of reactions proceed with participation of the methyl (methylene) group. It was our objective to analyze all known reactions of this type and show their high synthetic potential.

1 Introduction

2 Electrophilic Functionalization of Preformed Lithiated or Silylated Enamines

3 Uncatalyzed Reactions of Monoelectrophilic Reagents at the Methyl (Methylene) Group

4 Reactions Proceeding at Both the β- and β′-Carbon of the Enamine

5 Reactions Proceeding at the α-Methyl (Methylene) Group and β-Functional Group

6 Conclusion