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Sterically hindered phosphine ligands and uses thereof

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
The present invention is directed to a catalyst composition, comprising a Group 8 metal; and a ligand having a structure selected from the group consisting of: 1 wherein R, R' and R" are selected from the group consisting of H, a 1-10 carbon moiety, OR.sub.1, and NR.sub.2R.sub.3, wherein R.sub.1, R.sub.2, and R.sub.3 are each individually a 1-10 carbon moiety, with the proviso that one of R, R', or R" is not H, and that R, R', and R" together do not form an adamantyl moiety; and 2 wherein L is selected from the group consisting of a 1-30 carbon moiety with a tertiary carbon bound to phosphorous The present invention is also directed to a method of forming carbon-carbon, carbon-oxygen, carbon-sulfur, and carbon-nitrogen bonds between substrates using the above catalysts.
Hartwig, John F. (Durham, CT), Stambuli, James (New Haven, CT), Stauffer, Shaun (Schwenksville, PA)
10/ 013,156
December 10, 2001
[0002] This invention was made in part with government support under grant number DE-FG02-96ER14678 from the Department of Energy. The Federal Government has certain rights in this invention.