New chiral diphosphinites: synthesis of Rh complexes. Heterogenisation on zeolites
作者:A Fuerte、M Iglesias、F Sánchez
DOI:10.1016/s0022-328x(99)00373-3
日期:1999.10
New diphosphinite ligands derived from (2S,4R), (2S,4S)-1-benzyl-4-hydroxy-4-phenyl-2-(1,1-diphenylmethyl)pyrrolidinylmethanol and (2S,4R), (2S,4S)-1-(3-triethoxysilyl)propylaminocarbonyl-4-hydroxy-4-phenyl-2-(1,1-diphenylmethyl)pyrrolidi nylmethanol have been prepared in high yields (60–80%) and reacted with [RhCl(cod)]2 to yield cationic [Rh(diphosphinite)(cod)]+ complexes. Those metal complexes
衍生自(2 S,4 R),(2 S,4 S)-1-苄基-4-羟基-4-苯基-2-(1,1-二苯基甲基)吡咯烷基甲醇和(2 S,4 R),(2 S,4 S)-1-(3-三乙氧基甲硅烷基)丙基氨基羰基-4-羟基-4-苯基-2-(1,1-二苯基甲基)吡咯烷丙醇已得到高产率(60-80%)并与[RhCl(cod)] 2反应生成阳离子[Rh(diphosphinite)(cod)] +复合体。那些带有三乙氧基甲硅烷基的金属配合物通过控制水解共价键合到USY沸石上,得到Rh-杂相化的配合物。对氢化和加氢甲酰化反应的催化活性和选择性进行了比较研究(均相和负载),获得了对异相催化剂的增强性能。此外,这些催化剂可以通过简单的过滤而在连续运行中循环使用,而不会显着降低活性。