MECHANISM OF RECYCLIZATION OF FURANS TO THIOPHENES AND SELENOPHENES UNDER ACID CATALYSIS. 1. KINETIC STUDIES OF THE REACTION OF 2,5-DIALKYLFURANS WITH HYDROGEN SULFIDE IN THE PRESENCE OF HYDROCHLORID ACID
The transformation of 2,5-dialkylfurans to thiophene by reaction with hydrogen sulfide in the presence of hydrochloric acid was studied.The reaction was found to be first order with respect to the furan; the rate of consumption of the furan did not change with the increasing length of one of the alkyl substituents.Recrystalization in the presence of acid proceeds in two independent directions: through the formation of an intermediate dicarbonyl compound, and by direct conversion of the furan to a thiophene.Kinetic data showed that the reaction occurs mainly by the second route.
Voronin, S. P.,Gubina, T. I.,Markushina, I. A.,Kharchenko, V. G.
p. 1113 - 1117
(2007/10/02)
REACTIVITY OF C6 - C8 ALKANES IN FORMING ALKYLTHIOPHENES AND AROMATIC HYDROCARBONS IN THE PRESENCE OF H2S ON A Cr-CONTAINING CATALYST
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Ryashentseva, M. A.,Minachev, Kh. M.,Belanova, E. P.,Bogdanov, V. S.
p. 2489 - 2492
(2007/10/02)
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