Highly Enantioselective Synthesis of N‐Unprotected Unnatural α‐Amino Acid Derivatives by Ruthenium‐Catalyzed Direct Asymmetric Reductive Amination. - Hu, Le'an; Wang, Yuan‐Zheng; Xu, Lei; Yin, Qin; Zhang, Xumu (Angewandte Chemie, 2022)