Electronic Probing of Ketone Catalysts for Asymmetric Epoxidation. Search for More Robust Catalysts

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Abstract
Ketones with a fused oxazolidinone were synthesized and investigated to determine the electronic effect of the substituents at α-positions of ketone catalysts on the Baeyer−Villiger oxidation and catalytic properties for asymmetric epoxidation. These new ketones give high yields and ee's with only 1−5 mol % catalyst. The current studies further show that the electronic effect is very important for the ketone-catalyzed epoxidation.