Regio- and Enantioselective Cyclization of Epoxy Alcohols Catalyzed by a [CoIII(salen)] Complex
摘要:
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.