Patent: Ligands for Metals and Improved Metal-catalyzed Processes Based Thereon. 32Patent Authors: Buchwald, S.L.; Old, D.W.; Wolfe, J.P.; Palucki, M.; Kamikawa, K. U.S. Patent No. 7,026,498 Date Issued: April 11, 2006Patent Title: Ligands for Metals and Improved Metal-catalyzed Processes Based Thereon.