Asymmetric synthesis. Part 29: Asymmetric hydroformylation of styrene catalyzed by chiral spiro diphosphite–rhodium(I) complexes
摘要：
Chiral diphosphite ligands L 1 –L 3 were prepared by the reaction of (1 S ,5 S ,6 R )-( cis , trans )-spiro[4.4]nonane-1,6-diol with chlorophosphites. These ligands were tested in the rhodium catalyzed hydroformylation of styrene and enantioselectivities up to 69% were achieved. High regioselectivities (97%) to 2-phenylpropanal and high yields (98%) were obtained under mild reaction conditions. The influence of reaction conditions is also discussed.
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关键词：
catalysis chemisorption electron energy loss spectroscopy (EELS infrared absorption spectroscopy isotopic exchange/traces low index single crystal surfaces molybdenum molybdenum oxides nitrogen oxides surface chemical reaction
DOI：
10.1016/S0957-4166(98)00339-5
被引量：
年份：
1998
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