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Synthesis of Polymer‐Supported Fesulphos Ligands and their Application in Asymmetric Catalysis
Authors:Beln Martín‐Matute  Susana Isabel Pereira  Eduardo Pea‐Cabrera  Javier Adrio  Artur M&#x;S Silva  Juan&#x;C Carretero
Abstract:The synthesis of two Fesulphos‐based chiral ligands and their immobilization on a polystyrene support is described. These supported chiral ligands act as very efficient catalysts in 1,3‐dipolar cycloaddition and allylic substitution reactions providing the products with excellent enantioselectivities (91 to >99 % ee). Filtration of the catalyst from the reaction mixtures allows simple product isolation. The polymer‐supported Cu complex of chiral ligand PS‐ 8 can be recycled without further addition of a copper salt in 1,3‐dipolar cycloaddition reactions.
Keywords:allylic substitution  asymmetric catalysis  copper  cycloaddition  immobilization  palladium
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