کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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67144 | 48467 | 2010 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and application of peripherally alkyl-functionalized dendritic pyrphos ligands: Homogeneous-supported catalysts for enantioselective hydrogenation Synthesis and application of peripherally alkyl-functionalized dendritic pyrphos ligands: Homogeneous-supported catalysts for enantioselective hydrogenation](/preview/png/67144.png)
A new series of dendritic ligands with a chiral diphosphine located at the focal point have been synthesized through coupling of (R,R)-3,4-bis(biphenylphosphino)pyrrolidine (pyrphos) with peripherally alkyl-functionalized benzoic acid dendrons. These ligands were employed in the Rh-catalyzed asymmetric hydrogenation of prochiral dehydroamino acids, exhibiting excellent catalytic activities and enantioselectivities. The second-generation dendritic catalyst could be recovered by simple liquid–liquid biphasic separation and reused four times without serious loss of its activity and selectivity.
Peripherally alkyl-functionalized dendritic pyrphos ligands have been synthesized and employed in the Rh-catalyzed asymmetric hydrogenation. The second-generation dendritic catalyst could be recycled via a liquid–liquid biphasic separation method.Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 315, Issue 1, 2 January 2010, Pages 82–85