Asymmetric aziridination of chalcones catalyzed by a novel backbone 1,8-bisoxazolinylanthracene (AnBOX)-copper complexElectronic supplementary information (ESI) available: characterization data, 1H NMR and 13C NMR spectra for the ligand AnBOX 1 and all unknown compounds 3, and HPLC chromatograms for the determination of the ee values of all the aziridine derivatives 3. See http://www.rsc.org/suppdata/cc/b4/b404134h/
作者:Jiaxi Xu、Linge Ma、Peng Jiao
DOI:10.1039/b404134h
日期:——
Highly enantioselective aziridination of chalcones catalyzed by a novel backbone 1,8-bisoxazolidinylanthracene (AnBOX) and CuOTf with up to >99% ee and the opposite enantioselectivity compared with the ligands of Evans are described.
Rigid backbone 1,8-anthracene-linked bis-oxazolines (AnBOXes): design, synthesis, application and characteristics in catalytic asymmetric aziridination
作者:Linge Ma、Peng Jiao、Qihan Zhang、Jiaxi Xu
DOI:10.1016/j.tetasy.2005.09.025
日期:2005.11
chalcones and the ether group in alkenes with the copper in the catalyst is essential for high enantioselectivity, while the π–π stacking interaction between two reactants plays an importantly additional role for high enantioselectivity in asymmetricaziridination. An excellent backbone-controlled stereoselectivity was observed for the AnBOX ligands in asymmetricaziridination, as this will provide very