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- Enantioselective olefin epoxidation using novel biphenyl and binaphthyl azepines and azepinium salts
Jérôme Vachon, Cédric Lauper, Klaus Ditrich, Jérôme Lacour
Tetrahedron: Asymmetry 2006, 17, 2334-2338
Homologous biphenyl and (diastereomeric) binaphthyl tertiary azepines and quaternary iminium salts were prepared from (S)- and (R)-3,3-dimethylbutan-2-amine. Both the amines and iminium ions behave as effective catalysts for the enantioselective epoxidation of unfunctionalized olefins (ee up to 87%).
open archive unige:7058