Patent: Ligands for Metals and Improved Metal-Catalyzed Processes Based Thereon. 37Patent Authors: Buchwald, S.L.; Old, D.W.; Wolfe, J.P.; Palucki, M.; Kamikawa, K.U.S. Patent No. 7,247,731Date Issued: July 24, 2007Patent Title: Ligands for Metals and Improved Metal-Catalyzed Processes Based Thereon.