Ground-breaking progress has been made in the synthesis of chiral cyclic compounds from nonchiral unsaturated substrates with a nucleophilic functionality. A number of highly enantioselective electrophilic halocyclizations based on either the interaction of a chiral Lewis acid with an unsaturated substrate or the generation of a chiral electrophilic intermediate in situ from an electrophile and a chiral reagent (see scheme) were developed.
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Chen et al. (2010) studied this question.
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