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Title: | Polymer immobilization of bis(oxazoline) ligands using dendrimers as cross-linkers |
Authors: | Díez-Barra, Enrique; Fraile, José M. ![]() ![]() ![]() ![]() |
Issue Date: | 2003 |
Publisher: | Elsevier |
Citation: | Tetrahedron Asymmetry 14(7): 773-778 (2003) |
Abstract: | Homopolymers of bis(oxazoline) ligands can be used to prepare efficient catalysts for cyclopropanation reactions. However, the low accessibility to most bis(oxazoline) moieties leads to a low copper loading. As a consequence, the transmission of chiral information from the complexed polymer is not very efficient and only a few chiral cyclopropane molecules are obtained from each molecule of chiral ligand. The use of suitable dendrimers as cross-linkers in the polymerization process allows better copper functionalization. As a consequence the productivity of chiral cyclopropanes per molecule of chiral ligand greatly increases, which improves the ligand economy and the chirality transfer. © 2003 Elsevier Science Ltd. All rights reserved. |
URI: | http://hdl.handle.net/10261/64912 |
DOI: | 10.1016/S0957-4166(03)00074-0 |
Identifiers: | doi: 10.1016/S0957-4166(03)00074-0 issn: 0957-4166 |
Appears in Collections: | (ICMA) Artículos |
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