Patent: Ligands for Metals and Improved Metal-Catalyzed Processes BasedThereon. 18Patent Authors: Buchwald, S.L.; Wolfe, J.P.; Old, D.W.; Kamikawa, K.; Palucki, M.U.S. Patent No. 6,395,916Date Issued: May 28, 2002Patent Title: Ligands for Metals and Improved Metal-Catalyzed Processes BasedThereon.