6891-45-8Relevant articles and documents
On the mechanism of the dimethyldioxirane oxidation of σ(H) adducts (Meisenheimer complexes) generated from nitroarenes and carbanions
Adam, Waldemar,Makosza, Mieczyslaw,Zhao, Cong-Gui,Surowiec, Marek
, p. 1099 - 1101 (2007/10/03)
The mechanism of the novel dimethyldioxirane (DMD) oxidation of σ(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 (H2O, MeOH) enhance the reactivity of DMD through intermolecular hydrogen bonding.
Preparation and Reactions of Dianions from the Cresols
Bates, Robert B.,Siahaan, Teruna J.
, p. 1432 - 1434 (2007/10/02)
With n-BuLi/KO-t-Bu, protons are removed from the hydroxyl and methyl groups of cresols 5 to give dianions 6 in yields of 85percent (ortho), 95percent (meta), and 42percent (para).These dianions react with alkyl halides, Me3SiCl, Bu3SnCl, CO2, and oxidizing agents at carbon only and with dialkyl sulfates at both carbon and oxygen.Thus phenol derivatives bearing primary alkyl groups can be prepared from the corresponding methylphenols via dianions 6.