Methods for preparing ruthenium carbene complexes and precursors thereto
AssigneeElevance Renewable Sciences, Inc.
InventorsLinda A. Kunz, Steven A. Cohen
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Abstract
Methods of preparing ruthenium carbene complex precursors are disclosed herein. In some embodiments, the methods include reacting a ruthenium refinery salt with an L-type ligand and a reducing agent to form the ruthenium carbene complex precursor. Methods of preparing a ruthenium vinylcarbene complex are also disclosed. In some embodiments, preparing a ruthenium carbene complex includes converting a ruthenium carbene complex precursor into a ruthenium carbene complex having a structure (PR1R2R3)2Cl2Ru═CH—R4, wherein R1, R2, R3, and R4 are defined herein.
Claims39
A method for preparing a ruthenium carbene complex precursor comprising:
- reacting a ruthenium refinery salt with an L-type ligand and a reducing agent to form the ruthenium carbene complex precursor.
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A method for preparing a ruthenium carbene complex precursor comprising:
- reacting a ruthenium refinery salt with an L-type ligand and a reducing agent to form the ruthenium carbene complex precursor;
- wherein the L-type ligand comprises cyclooctadiene or a phosphorus-containing material having a structure PR1R2R3;
- wherein the ruthenium refinery salt comprises a material selected from the group consisting of (NH4)2RuCl5, (NH4)2RuCl5.H2O, polyhydrated (NH4)2RuCl5, (NH4)4[Ru2OCl10], and combinations thereof;
- wherein the reducing agent comprises a metal selected from the group consisting of Group 7 elements, Group 8 elements, Group 9 elements, Group 10 elements, Group 11 elements, and combinations thereof;
- wherein the ruthenium carbene complex precursor comprises a compound having a structure [RuCl2(COD)]x or a compound having a structure RuCl2(PR1R2R3)3;
- wherein x is an integer value of 1 or more;
- wherein R1, R2, and R3 are alike or different and are each independently selected from the group consisting of substituted or unsubstituted aryl, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted aryloxy, substituted or unsubstituted C1-C10 alkoxy, and combinations thereof;
- and
- wherein covalent bonds may optionally exist between two or more of R1, R2, and R3;
- and
- wherein any two of R1, R2, and R3 taken together may optionally form a ring with phosphorus.
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A method of preparing a product that comprises [RuCl2(COD)]x, the method comprising:
- reacting a ruthenium refinery salt with cyclooctadiene and a reducing agent in an alcoholic solvent under reflux conditions to form the product;
- wherein x is an integer value of 1 or more;
- wherein the ruthenium refinery salt comprises a material selected from the group consisting of (NH4)2RuCl5, (NH4)2RuCl5.H2O, polyhydrated (NH4)2RuCl5, (NH4)4[Ru2OCl10], and combinations thereof;
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- wherein the reducing agent comprises a metal selected from the group consisting of Group 7 elements, Group 8 elements, Group 9 elements, Group 10 elements, Group 11 elements, and combinations thereof.
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Dependencies are inferred from the claim text.