Mechanism of selective -quinol formation in the cobalt schiff base complex-catalyzed oxygenation of 4-alkyl-2,6-di--butylphenols |
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Authors: | A Nishinaga H Tomita T Matsuura |
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Institution: | Department of Synthetic Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan |
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Abstract: | The selective formation of -quinols in the Co(Salpr)-catalyzed oxygenation of 4-alkyl-2,6-di--butylphenols in MeOH has been found to involve the rate determining reduction of peroxy--quinolato Co(III) complex formed in the initial fast step. An ionic mechanism of the reduction of the OO bond in the peroxy complex by MeOH has been discussed based on kinetic studies. The reactive species in the catalytic cycle is found to be Co(III)(Salpr)(OH)]. |
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