Patent: Catalytic Asymmetric and Non-Asymmetric Reduction of Imines and Oximes Using Metal Catalysts. 5Patent Authors: Buchwald, S.L.; Willoughby, C.A.U.S. Patent No. 5,292,893Date Issued: March 8, 1994Patent Title: Catalytic Asymmetric and Non-Asymmetric Reduction of Imines and Oximes Using Metal Catalysts.