Chemistry of Heterocyclic Compounds p. 1113 - 1117 (1989)
Update date:2022-08-11
Topics:
Voronin, S. P.
Gubina, T. I.
Markushina, I. A.
Kharchenko, V. G.
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.
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