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Structure of 2,3-dihydro-5,6-dimethoxy-3-(o-nitrobenzylidene)benzo[b]thiophen-2-one

โœ Scribed by Salem, G. ;Terzis, A. ;Mentzafos, D.

Book ID
119771060
Publisher
International Union of Crystallography
Year
1988
Tongue
English
Weight
188 KB
Volume
44
Category
Article
ISSN
0108-2701

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โœ A.P.A. Crew; G. Jenkins; R.C. Storr; M. Yelland ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 219 KB

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.