19832-87-2Relevant academic research and scientific papers
Oxidation of phenols with chlorine dioxide
Ganiev,Ganieva,Kabal'nova
, p. 2281 - 2284 (2007/10/03)
The oxidation of different phenols, viz., phenol, 3-methylphenol, 4-methylphenol, 4-tert-butylphenol, 2-cyclohexylphenol, 2,6-di-tert-butyl-4- methylphenol, and 2,4-dichlorophenol, with chlorine dioxide in acetonitrile was studied spectrophotometrically. The reaction rate is described by a second-order equation w = k[PhOH]? [ClO2]. The rate constants were measured and activation parameters of oxidation were determined in a temperature interval of 10-60°C. A dependence of the reaction rate constant on the phenol structure was found. The oxidation products were identified, and their yields were established.
Ultrasonically activated oxidation of hydroquinones to quinones catalysed by ceric ammonium nitrate doped on metal exchanged K-10 clay
Singh, Vasundhara,Sapehiyia, Varinder,Kad, Goverdhan L.
, p. 198 - 200 (2007/10/03)
We have accomplished the oxidation of hydroquinones to quinones in quantitative yields using catalytic quantity of ceric ammonium nitrate doped on various metal-exchanged K-10 clay, as a mild and efficient reagent, by ultrasonic activation. The exchanged cations examined were Fe3+, Cu2+, Ce4+ and K-10 clay itself. The best results were obtained using Fe3+-Mont. K-10 clay.
Chlorination of quinonoid compounds using dichlorine monoxide
Thapliyal,Singh,Khanna
, p. 1079 - 1083 (2007/10/02)
Dichlorine monoxide is a selective reagent for the monochlorination at the active quinonoid position in benzoquinones and naphthoquinones.
Selective halogenation of 1,4-benzoquinones and 1,4-naphthoquinones with copper(II) halide adsorbed on alumina
Singh,Khanna
, p. 2083 - 2089 (2007/10/02)
1,4-Benzoquinone or 1,4-naphthoquinone and their derivatives have been halogenated selectively at quinonoid positions with copper(II) halide adsorbed on neutral alumina followed by refluxing in halobenzene to give mono-, di-, tri- and tetra-haloquinones.
