Abstract
AbstractMethods for the regioselective ring‐opening of 3,4‐epoxy alcohols and 2,3‐epoxy alcohols with halide nucleophiles, using a diarylborinic acid catalyst, are disclosed. Ring‐opening occurs at the position proximal to the OH group, an effect ascribed to a catalytic tethering mechanism whereby coordination to the substrate OH group positions the diarylborinic acid to deliver a coordinated halide nucleophile. These methods provide access to halohydrin substitution patterns that were not previously accessible through catalytic epoxide ring‐opening reactions.magnified image
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