Enantioselective Cyclopropanation of Styrene Catalysed by Copper(I) Complexes with Chiral Oxazolines

A large set of copper complexes, prepared in situ from copper(I)-triflate and a variety enantiopure oxazoline ligands, was assessed as chiral catalysts in the enantioselective cyclopropanation of styrene by ethyl diazoacetate. Enantioselectivities up to 60% and up to 52%, respectively, for trans- an...

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Bibliographic Details
Published in:Tetrahedron 2000-04, Vol.56 (18), p.2889-2893
Main Authors: Chelucci, Giorgio, Sanna, Maria G., Gladiali, Serafino
Format: Article
Language:English
Subjects:
asymmetric cyclopropanation
copper catalysts
oxazoline ligands
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Summary:A large set of copper complexes, prepared in situ from copper(I)-triflate and a variety enantiopure oxazoline ligands, was assessed as chiral catalysts in the enantioselective cyclopropanation of styrene by ethyl diazoacetate. Enantioselectivities up to 60% and up to 52%, respectively, for trans- and cis-2-phenylcyclopropanecarboxylate were observed.
ISSN:0040-4020
1464-5416
DOI:10.1016/S0040-4020(00)00144-7