Strategies to immobilize well-defined olefin metathesis catalysts: Supported homogeneous catalysis vs. surface organometallic chemistry

Abstract

This review is mainly devoted to a description of the strategies that have been implemented to develop well-defined olefin metathesis catalysts immobilized on solid supports. Two main approaches have been investigated involving supported homogenous catalysts or heterogeneous catalysts prepared by surface organometallic chemistry. Advantages, limitations and possible developments of these systems are discussed. 1 Introduction 2 Immobilized Olefin Metathesis Catalysts via the Supported Homogeneous Catalysis Approach 2.1 Immobilized Schrock-Type Catalysts 2.2 Immobilized Grubbs-Type Catalysts 2.3 Other Immobilized Ru Olefin Metathesis Catalysts 2.4 Immobilization by Micro-Encapsulation 3 Immobilized Olefin Metathesis Catalysts via Surface Organometallic Chemistry 3.1 Grafting Hydrocarbyl Complexes 3.2 Grafting of Other Types of Molecular Precursors 3.3 Activation of Molecular Organometallic Complexes by Surface Lewis Acid Sites 4 Conclusion © 2007 Wiley-VCH Verlag GmbH & Co. KGaA,.