18492-37-0Relevant articles and documents
Polymer-Supported Diaryl Selenoxide and Telluroxide as Mild and Selective Oxidizing Agents
Hu, Nan Xing,Aso, Yoshio,Otsubo, Tetsuo,Ogura, Fumio
, p. 879 - 884 (1986)
Polystyrene-bound diaryl selenoxide and telluroxide have been prepared, which behaved as mild oxidizing agents for thiols to disulfide, phosphines to phosphine oxides, hydroquinone and catechol to p- and o-benzoquinones, and thioketones to oxo compounds.The telluroxide completed these reactions in shorter periods or under milder conditions than the selenoxide.In addition, they effected novel solvent-dependent reactions of thioamides involving thioureas to 1,2,4-thiadiazoles or to nitriles.In nonacidic solvents, the dehydrosulfurization to nitriles occured in preference to the oxidative dimerization to 1,2,4-thiadiazoles, but an acidic solvent such as acetic acid promoted the latter reaction.
Kinetics of Dehydration of Camphor and Fenchone over Alumina Catalysts
Krishnasamy, V.,Balasubramanian, K.
, p. 213 - 215 (2007/10/02)
Kinetics of dehydration of camphor and fenchone to aromatics have been investigated over alumina of different acid strength in a flow reactor in the temperature range 300-405 deg.The dehydration activity increases with decreasing acid strength and fenchone is more reactive than camphor over all the three catalysts under the experimental conditions.The reactions follow first order kinetics.Energy of activation and other thermodynamic parameters are calculated.A linear regression analysis has been carried out to obtain isokinetic relationship which holds good for dehydration of camphor and fenchone with correlation coefficient of 0.98 and 0.96, respectively.
STERIC ASPECTS OF THE OXIDATION OF THIOKETONES BY SINGLET OXYGEN
Ramnath, Narayan,Jayathertha, Vaidhya Rao,Ramesh, Varadaraj,Ramamurthy, Vaidhyanathan
, p. 89 - 92 (2007/10/02)
Singlet oxygen oxidation of dialkyl thioketones yields the corresponding ketones and in some cases sulfoxides in varying amounts.Steric considerations on the reactive zwitterionic/diradical intermediates have been invoked to rationalise the product distribution.