30006-04-3Relevant 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.
Intramolecular Catalysis in the Detritiation of 3-Carboxy-2-(acetyl)thiophene
Buncel, Erwin,Jones, John R,,Sowdani, Kassim,Spinelli, Domenico,Consiglio, Giovanni,Arnone, Caterina
, p. 559 - 562 (2007/10/02)
The kinetics of detritiation of 3-carboxy-2-(acetyl)thiophene have been studied at 50 deg C in aqueous buffer systems as well as at 25 deg C in sodium hydroxide solutions.The results, when compared with similar investigations on the corresponding 3-iodo- and 3-thiomethyl-2-(acetyl)thiophenes, serve to show the importance of intramolecular catalysis by the carboxylate group.Estimates of the efficiency of the catalysis have been obtained, these are similar in magnitude to the values previously reported for derivatives of 2'-carboxyacetophenones.
LIQUID-PHASE OXIDATION OF METHYLACETOTHIENONES WITH COBALT-BROMIDE CATALYST
Kazakova, O. A.,Volkov, M. N.,Konstantinov, P. A.
, p. 431 - 434 (2007/10/02)
The oxidation of four isomeric methylacetothienones by molecular oxygen in acetic acid in the presence of cobalt-bromide catalyst was investigated.The reaction leads to the formation of the corresponding keto carboxylic acid.The keto aldehydes are intermediate products.
