Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5278014 | Tetrahedron Letters | 2008 | 4 Pages |
Abstract
A new type of supramolecular chiral phosphorus-based ligands was prepared from easily available monodentate ligands through complexation between dibenzylammonium salt and dibenzo[24]crown-8 macrocycle. Rhodium complexes with these supramolecular ligands were prepared, and the supramolecular bidentate ligand-containing catalyst has demonstrated better catalytic activity for all substrates, and higher enantioselectivity except for the ortho-substituted substrates than those obtained from the parent monodentate ligand in the asymmetric hydrogenation of α-dehydroamino acid esters.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Yong Li, Yu Feng, Yan-Mei He, Fei Chen, Jie Pan, Qing-Hua Fan,