Trianionic ligand precursor compounds and uses thereof in constrained geometry catalysts
AssigneeThe University of Toledo
InventorMark R. Mason
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Abstract
Trianionic ligand precursor compounds, catalyst systems containing the precursor compounds, and uses of the precursor compounds are described. The present invention also provides constrained geometry catalysts, methods to make the constrained geometry catalysts and methods to use the constrained geometry catalysts in various reaction systems, including polymerization, metathesis reactions, and hydroamination reactions.
Claims59
A compound of the Formula A or the triply deprotonated Formula A′ having the following structures:
- and stereoisomers, solvates and hydrates thereof, wherein
- R is selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, substituted alkyl, substituted alkenyl, substituted alkynyl, substituted cycloalkyl, substituted cycloalkenyl, aryl, heteroaryl silyl, heterosilyl, and heterocyclic;
- or R is combined with at least one other R to form one or two C3, C4, C5 or C6 aliphatic or aromatic fused ring or rings, wherein when two fused rings are present, the number of carbons in each ring may be the same or different from each other;
- X is an element selected from the group consisting of:
- a Group 13 element, a Group 14 element;
- a Group 15 element;
- and a Group 16 element;
- wherein n=0, 1, 2;
- Y is selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, substituted alkyl, substituted alkenyl, substituted alkynyl, substituted cycloalkyl, substituted cycloalkenyl, aryl, heteroaryl silyl, heterosilyl, and heterocyclic;
- Z is an element selected from the group consisting of:
- a Group 13 element;
- a Group 14 element;
- and a Group 15 element;
- wherein when Z is a Group 13 or 15 element, Y is absent;
- E is selected from the group consisting of H, D, halogen, and substituted silicon.
A compound selected from the group consisting of Formula 1-4
A method for making a trianionic ligand precursor compound, comprising:
- reacting fluorene with n-butyllithium and bromoacetaldehyde diethylacetal to form fluoroenylacetaldehyde diethylacetal;
- and
- reacting the fluorenylacetaldehyde diethylacetal with a pyrrole or an indole in the presence of an acid catalyst to yield a trianionic ligand precursor compound.
A method for making a trianionic ligand precursor compound, comprising:
- reacting indene with n-butyllithium and bromoacetaldehyde diethylacetal to form indenyl acetaldehyde diethylacetal;
- and
- reacting the indenyl acetaldehyde diethylacetal with a pyrrole or an indole in the presence of an acid catalyst to yield a trianionic ligand precursor compound.
Dependencies are inferred from the claim text.