Enantiopure C1- and C2-symmetric bispidine ligands have been synthesized and screened in the asymmetric copper-catalyzed cyclopropanation of styrene. In order to improve the enantiomeric excesses (ee) of the cyclopropane derivatives, the best performing C1-symmetric diamine ligand was selected for studies on the reaction conditions. The optimized procedure allowed us to obtain up to 91% ee for the cis-cyclopropane derivative and up to 79% ee for the trans one.

Enantioselective copper-catalyzed cyclopropanation of styrene by means of chiral bispidine ligands / G. Lesma, C. Cattenati, T. Pilati, A. Sacchetti, A. Silvani. - In: TETRAHEDRON-ASYMMETRY. - ISSN 0957-4166. - 18:5(2007), pp. 659-663. [10.1016/j.tetasy.2007.02.024]

Enantioselective copper-catalyzed cyclopropanation of styrene by means of chiral bispidine ligands

G. Lesma
Primo
;
A. Sacchetti
Penultimo
;
A. Silvani
Ultimo
2007

Abstract

Enantiopure C1- and C2-symmetric bispidine ligands have been synthesized and screened in the asymmetric copper-catalyzed cyclopropanation of styrene. In order to improve the enantiomeric excesses (ee) of the cyclopropane derivatives, the best performing C1-symmetric diamine ligand was selected for studies on the reaction conditions. The optimized procedure allowed us to obtain up to 91% ee for the cis-cyclopropane derivative and up to 79% ee for the trans one.
Settore CHIM/06 - Chimica Organica
2007
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/39748
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