Enantioselective Bromocyclization of Olefins Catalyzed by Chiral Phosphoric Acid
Organic Letters2011Vol. 13(24), pp. 6350–6353
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Abstract
A chiral phosphoric acid catalyzed enantioselective bromocyclization of olefins is described. Various cis-, trans-, or trisubstituted γ-hydroxy-alkenes and γ-amino-alkenes can cyclize under the reaction conditions to give optically active 2-substituted tetrahydrofurans and tetrahydropyrroles in up to 91% ee.
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