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Formation of 4,4,5,5,6,6-hexafluorocyclopenta[b]thiophene upon copyrolysis of 2-substituted thiophenes with tetrafluoroethylene

โœ Scribed by V. E. Platonov; A. M. Maksimov; G. G. Yakobson

Book ID
112438566
Publisher
Springer
Year
1977
Tongue
English
Weight
155 KB
Volume
26
Category
Article
ISSN
1573-9171

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On heating in sulpholane 4,6-dihydrothieno[3,4-blthiophene 5,5-dioxides give 2,3dihydro-2,3-bis(methylene)thiophenes which can be intercepted in Diels-Alder reactions. Sulphur dioxide is a very efficient trap for these thiophene xylylenes giving the cyclic sulphones by cheletropic addition.