Kinetic resolution in asymmetric epoxidation using iminium salt catalysis
The first reported examples of kinetic resolution in epoxidation reactions using iminium salt catalysis are described, providing up to 99% ee in the epoxidation of racemic cis-chromenes.
Bulman Page, Philip C.,Appleby, Louise F.,Chan, Yohan,Day, David P.,Buckley, Benjamin R.,Slawin, Alexandra M. Z.,Allin, Steven M.,McKenzie, Michael J.
p. 8074 - 8082
(2013/09/12)
A facile procedure for acetalization of aldehydes and ketones catalyzed by cerium(III) trifluoromethanesulfonate
Aldehydes and ketones are readily protected in the presence of trialkyl orthoformate and a catalytic amount of cerium(III) trifluoromethanesulfonate under mild conditions to give the corresponding acetals in good to excellent yields. Due to the mild reaction conditions, this method is compatible with acid-sensitive substrates. Copyright