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US 6,660,877 B2Granted
Phosphonite ligands and their use in hydrocyanation
AssigneeE. I. Du Pont de Nemours and Company
InventorsChristian P. Lenges, Helen S. M. Lu, Joachim C. Ritter
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Abstract
Disclosed herein are processes for hydrocyanation and isomerization of olefins by using at least one multidentate phosphonite ligands, including organometallic phosphonite ligands with a Group VIII metal or Group VIII metal compound, and optionally, a Lewis acid promoter.
Claims9
A hydrocyanation process, said process comprising:
- contacting an ethylenically unsaturated olefin compound with HCN in the presence of a catalyst composition, said catalyst composition comprises a Group VIII metal and a phosphonite ligand, said ligand having a structure selected from the group consisting of:
- wherein the X groups independently are selected from the group consisting of substituted or unsubstituted organic aromatic group, and when X is substituted, the substituent on X is independently selected from the group consisting of C1 to C12 alkyl, perfluoroalkyl, cycloalkyl, alkoxy, acetal, ketal, alkylaryl, aryl, hetero aryl, cyano, and hydrogen.
Dependencies are inferred from the claim text.