16363-92-1Relevant academic research and scientific papers
THE STAGE CHARACTER OF THE OXIDATION OF DIALKYLTHIOPHENES
Volkov, M. N.,Kazakova, O. A.
, p. 370 - 373 (2007/10/02)
The reasons for the stage character of the oxidation of dialkylthiophenes catalyzed by a cobalt bromide catalyst are examined.The stage character of oxidation is due to the deactivation of the catalyst by the corresponding alcohol formed during oxidation.At the first stage of the process only the product from oxidation of the α-alkyl group, i.e., the corresponding ketone, ester, and thiophenecarboxylc acid, are formed.The rate constants for their formation were calculated.
CATALYZED LIQUID-PHASE OXIDATION OF DIALKYLTHIOPHENES
Volkov, M. N.,Kazakova, O. A.
, p. 553 - 557 (2007/10/02)
The oxidation of 3-methyl-2-ethylthiophene with molecular oxygen in glacial acetic acid in the presence of cobalt-bromide catalyst was investigated.It was established that there is a dependence of the rate of oxidation of this compound on its concentration, on the catalyst (cobalt acetate) concentration, and on the initiator (NaBr) concentration.The principal oxidation products are 3-methyl-2-acetothienone (III) and 1-(3-methyl-2-thienyl)ethyl acetate, which were isolated and characterized.The reactivity of 3-methyl-2-ethylthiophene in the oxidation reaction is higher than that of 4-methyl-2-ethylthiophene.
