Highly Enantioselective Organocatalytic Oxidative Kinetic Resolution of Secondary Alcohols Using Chiral Alkoxyamines as Precatalysts: Catalyst Structure, Active Species, and Substrate Scope
The development and characterization of enantioselective organocatalyticoxidative kinetic resolution (OKR) of racemic secondaryalcoholsusing chiral alkoxyamines as precatalysts are described. A number of chiral alkoxyamines have been synthesized, and their structure-enantioselectivity correlation study in OKR has led us to identify a promising precatalyst, namely, 7-benzyl-3-n-butyl-4-oxa-5-azahomoadamantane
A highly enantioselective organocatalyticoxidative kinetic resolution (OKR) of racemic secondaryalcohols has been accomplished using asymmetric organocatalysis. A panel of chirally modified 2-azaadamantane N-oxyls (AZADOs) exhibit superior catalytic activity and high enantioselectivity, allowing us to obtain optically active secondaryalcohols with a krel value up to 82.2.