Synthesis 2009(7): 1049-1061  
DOI: 10.1055/s-0028-1088001
REVIEW
© Georg Thieme Verlag Stuttgart ˙ New York

Catalytic Transformations of Benzylic Carboxylates and Carbonates

Ryoichi Kuwano*
Department of Chemistry, Graduate School of Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
Fax: +81(92)6422572; e-Mail: rkuwano@chem.kyushu-univ.jp;
Further Information

Publication History

Received 19 January 2009
Publication Date:
06 March 2009 (online)

Abstract

Benzylic carboxylates and carbonates react with various molecules in the presence of homogeneous palladium or cobalt catalysts. The catalytic transformations occur at the benzylic carbons of the substrates, affording benzylic substitution products. This review surveys the catalytic reactions using benzylic carboxylates and carbonates as substrates. Furthermore, the related studies on (η³-benzyl)metal complexes are summarized in order to facilitate the understanding and consideration of the catalytic substitution.

1 Introduction

2 Chemistry of the (η³-Benzyl)metal Complex

2.1 Structure of the (η³-Benzyl)metal Complex

2.2 Reactivity of the (η³-Benzyl)metal Complex

3 Catalytic Transformations of Benzylic Esters

3.1 Nucleophilic Substitution

3.2 Cross-Coupling with Organometallic Compounds

3.3 Miscellaneous Reactions

4 Concluding Remarks