HIGH ACTIVITY METAL CARBENE METATHESIS CATALYSTS GENERATED USING A THERMALLY ACTIVATED N-HETEROCYCLIC CARBENE PRECURSOR

摘要

The invention provides a method of making a ruthenium or osmium carbene catalyst having an imidazolidine in the presence of an olefin with the application of energy. The resulting metal compound has two carbene ligands, one from the original carbene, the other from the imidazolidine. The imidazolidine has bulky protecting groups in the two positions adjacent to the carbene carbon. The method of making the imidazoline from the salt in the presence of a base and chloroform is also disclosed.