Enantioselective Epoxidation of 2,2-Dimethylchromenes Using Achiral Mn-Salen Complex as a Catalyst in the Presence of Chiral Amine

Authors:
  • THTakashi Hashihayata
    Takashi Hashihayata
  • YIYoshio Ito
    Yoshio Ito
  • TKTsutomu Katsuki
    Tsutomu Katsuki
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Abstract
Epoxidation of 2,2-dimethylchromene derivatives using achiral (salen)manganese(III) complexes as catalysts in the presence of (-)-sparteine was found to proceed enantioselectively (up to 73% ee).