Molecular sieve catalysts for metathesis reactions

摘要

Metathesis represents one of the most important reactions in organic laboratory and industrial synthesis ranging from the production of ethylene or propylene,different polymers,up to fine chemicals and pharmaceuticals.In this contribution we report on the development of new heterogeneous catalysts based on mesoporous molecular sieves.Three types of new catalysts are discussed:1)zeolite based metathesis catalysts;2)mesoporous molecular sieves modified with transition metal oxides(Re2O7,MoO3);3)mesoporous supports with immobilized organometallic catalysts of Schrock and Grubbs types.Synthesis,characterization and particularly catalytic properties of these novel metathesis catalysts are discussed with the emphasis on their advantages in comparison with conventional catalysts.