Mn-Salen Catalyzed Asymmetric Oxidation of Simple Olefins and Sulfides
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概要
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<I>Among the several Mn-salen type catalysts studied, a rationally designed Mnsalen catalyst (14) was found to be the most effective for asymmetric epoxidation of simple olefins, especially cis-disubstituted and trisubstituted olefins conjugated with aryl, alkenyl and alkynyl groups. The mechanism of asymmetrc-inducition of this reaction has been well rationalized by the proposal that olefins approach oxo-metal from the side-on to give a metallaoxetane intermediate, wherein steric and electronic repulsions between the salen ligand and the olefinic substituent dictate the orientation of the incoming olefins and, the intermediate is transformed into epoxides via a radical intermediate. Asymmetric oxidation of sulfides was also found to be effectively catalyzed by Mn-salen catalyst (21).</I>
- 社団法人 有機合成化学協会の論文
- 1995-11-01
著者
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Katsuki Tsutomu
Department Of Chemistry Faculty Of Science Graduate School Kyushu University
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Katsuki Tsutomu
Department Of Chemistry Faculty Of Science Kyushu University
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