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Communication | Regular issue | Vol 34, No. 8, 1992, pp.1487-1490
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6027
■ Tetra-2-thienyl- and Tetrakis(5,2’-bithiophene-2-yl)thiophenes and Selenophenes

Juzo Nakayama,* Kanji Sawada, Akihiko Ishii, and Masamatsu Hoshino

*Department of Chemistry, Faculty of Science, Saitama University, Urawa, Saitama 338, Japan

Abstract

Heating a mixture of di-2-thienylacetylene (1) and elemental selenium in benzene at 220-225 °C for 9 h in a stainless steel autoclave affords tetra-2-thienylselenophene (2b) in 65% yield. In similar ways, heating a mixture of bis(5,2’-bithiophene-2-yl)acetylene (3) and elemental sulfur or selenium gives tetrakis-(5,2’-bithiophene-2-yl)thiophene (4a) or selenophene (4b), respectively, in satisfactory yields.