Two precatalysts for application in asymmetric homogeneous hydrogenation.

Antje Meißner,Cornelia Pribbenow,Hans-Joachim Drexler,Detlef Heller

Acta crystallographica. Section C, Structural chemistry（2014）

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摘要

The title compounds, [(1R,1'R,2R,2'R)-2,2'-bis(diphenylphosphanyl)-1,1'-dicyclopentane](η(4)-norbornadiene)rhodium(I) tetrafluoridoborate, [Rh(C34H36P2)(C7H8)]BF4, (I), and [(1R,1'R,2R,2'R)-2,2'-bis(diphenylphosphanyl)-1,1'-dicyclopentane][η(4)-(Z,Z)-cycloocta-1,5-diene]rhodium(I) tetrafluoridoborate dichloromethane monosolvate, [Rh(C34H36P2)(C8H12)]BF4·CH2Cl2, (II), are applied as precatalysts in asymmetric homogeneous hydrogenation, e.g. in the reduction of dehydroamino acids, affording excellent enantiomeric excesses [Zhu, Cao, Jiang & Zhang (1997). J. Am. Chem. Soc. 119, 1799-1800].

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关键词

crystal structure,homogeneous asymmetric catalysis,hydrogen consumption,hydrogenation,precatalysts,rhodium complex

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