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The generation of 2,3-dihydro-2,3-bis-(methylene)thiophenes from 4,6-dihydrothieno[3,4-b]thiophene 5,5-dioxides

✍ Scribed by A.P.A. Crew; G. Jenkins; R.C. Storr; M. Yelland

Book ID: 104222109
Publisher: Elsevier Science
Year: 1990
Tongue: French
Weight: 219 KB
Volume: 31
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)88841-3

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✦ Synopsis

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.

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