α-Aminoacids, their esters and sodium salts may be transformed by a modified Mannich-reaction into N-phosphinomethyl or N,N-bis(phosphinomethyl) derivatives. The sodium or triethylammonium salts of the chiral bisphosphines l-()-N,N-bis(diphenylphosphinomethyl)-alanine and -valine may be used as ligands to form enantioselective hydrogenation catalysts with rhodium complexes. The highest optical yield
α-氨基酸,它们的酯和钠盐可通过修饰的曼尼希反应转化为N-膦甲基或N,N-双(膦甲基)衍
生物。手性
双膦-1-(N)-N,N-双(
二苯基膦甲基)-丙
氨酸和-缬
氨酸的
钠或三乙
铵盐可以用作
配体,以与
铑配合物形成对映选择性氢化催化剂。达到的最高光学产率为29%。