The mechanism of the novel dimethyldioxirane (DMD) oxidation of sigma(H) adducts (Meisenheimer complexes) generated from nitroarenes and carbanions was elucidated. The proposed mechanism, which is akin to that of the oxidative Nef reaction, is supported by the isolation of the cyclohexadienone intermediate and the lack of a primary kinetic isotopic effect. Protic solvents (H(2)O, MeOH) enhance the reactivity of DMD through intermolecular hydrogen bonding.
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Adam et al. (2000) studied this question.
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