Synthesis 2013; 45(5): 581-591
DOI: 10.1055/s-0032-1318218
short review
© Georg Thieme Verlag Stuttgart · New York

Palladium-Catalyzed Synthesis of Carbo- and Heterocycles through Norbornene-Mediated ortho C–H Functionalization

Raffaella Ferraccioli*
CNR-Istituto di Scienze e Tecnologie Molecolari (ISTM), Via C. Golgi 19, 20133 Milano, Italy   Fax: +39(2)50314139   Email: Raffaella.Ferraccioli@istm.cnr.it
› Author Affiliations
Further Information

Publication History

Received: 16 December 2012

Accepted after revision: 24 January 2013

Publication Date:
07 February 2013 (online)


Abstract

Direct aromatic functionalization based on the use of a palladium catalyst and norbornene is a useful method to achieve straightforward synthesis of carbo- and heterocyclic compounds. New ring formation occurs through a cascade process triggered by ortho C–H alkylation (inter- and intramolecular) or arylation (homo­- and heterocoupling) of aryl iodides. Up to four new carbon–carbon bonds are generated under palladium control in a single operation.

1 Introduction

2 ortho C–H Alkylation

2.1 Intermolecular ortho C–H Alkylation

2.1.1 Heck Reaction

2.1.2 C–N Coupling

2.1.3 C–H Arylation

2.2 Intramolecular ortho C–H Alkylation

2.2.1 Heck Reaction

2.2.2 Cyanation Coupling

2.3 Coupling Inter- and Intramolecular ortho C–H Alkylation

3 ortho C–H Arylation

3.1 Homocoupling

3.2 Heterocoupling

3.2.1 α-Arylation/CO Addition

3.2.2 Heck Reaction

3.2.3 C–N Coupling

4 Conclusion