Recently, olefin metathesis reaction employing metallic carbene complex as a catalyst is attracting a high degree of attention. Metathesis is referred to as a reaction in which an exchange of alkylidene group occurs between two olefin molecules.
In 1995 R.H. Grubbs and co-workers have developed the present reagent 1, as a metathesis catalyst. The catalyst 1 is characterized by being stable toward the oxygen and moisture in the atmosphere and inert to the presence of a variety of functional groups when compared with the conventional metathesis catalysts. The reactions using the catalyst 1 are mainly classified into ring-closing metathesis reaction and ring-opening cross metathesis reaction.
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