Abstract

The intramolecular cyclization of epoxy alcohols was catalyzed with excellent regio- and enantiocontrol by a [CoIII(salen)] complex. High endo selectivity was observed for the enantioselective cyclization of terminal epoxy alcohols [Eq. (a)], while the reaction of meso substrates produced novel cyclic and bicyclic ethers in good yields and high enantiopurity. TBME=tert-butyl methyl ether.

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