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Poly(ethylene glycol) supported cinchona alkaloids as phase transfer catalysts: application to the enantioselective synthesis of α-amino acids

✍ Scribed by Baptiste Thierry; Jean-Christophe Plaquevent; Dominique Cahard

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 193 KB
Volume: 14
Category: Article
ISSN: 0957-4166
DOI: 10.1016/s0957-4166(03)00279-9

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✦ Synopsis

We have demonstrated that quaternary ammonium salts of cinchona alkaloids grafted to a poly(ethylene glycol) matrix are efficient homogeneous catalysts in the enantioselective alkylation of glycine Schiff base derivatives. The role of the solvent, the molecular weight of the polymer and the anchorage site on the alkaloid were investigated, leading to ee's up to 81%.

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