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Synlett 1993; 1993(9): 641-645
DOI: 10.1055/s-1993-22554
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Asymmetric Epoxidation with Optically Active (Salen)manganese(III) Complexes: From Which Direction Does the Olefin Approach the Metal-Oxo Bond?

Naoki Hosoya* , Akira Hatayama, Koichi Yanai, Hiroyuki Fujii, Ryo Irie, Tsutomu Katsuki
  • *Department of Chemistry, Faculty of Science, Kyushu University 33, Hakozaki, Higashi-ku, Fukuoka 812, Japan
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Publication Date:
19 March 2002 (online)

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Asymmetric epoxidation of trans-stilbene, cis-ß-methylstyrene, dihydronaphthalene, and 6-acetamido-2,2-dimethyl-7-nitrochromene was examined with various optically active (salen)manganese(III) complexes as catalysts. From the results, it was strongly suggested that cis-olefin approaches metal-oxo bond along nitrogen-metal bond axis.