During recent years, olefin metathesis has gained a position of increasing significance, attracting a vast amount
of interest both in industry and academia. The initial success of olefin metathesis has spurred the intense investigation of
new catalysts for this transformation. In the context of the huge advances in transition metal complexes, a good number of
metal complexes have been employed as metathesis catalysts. The chemists most responsible for developing such catalysts
are Robert H. Grubbs and Richard R. Schrock. Olefin metathesis was awarded with the Nobel Prize in Chemistry in
2005 for Chauvin, Grubbs and Schrock. This mini review article includes recent patents on catalysts used for olefin metathesis.
Keywords: Catalysis, metal carbenes, olefin metathesis, polymerization, transition metal complexes.
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