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Paper | Regular issue | Vol 32, No. 5, 1991, pp.991-1002
Published online, 1st January, 1970
DOI: 10.3987/COM-91-5719
Preparation of a Series of Oligo[thiophene-2,5-diyl]vinylenes

Juzo Nakayama* and Toru Fujimori

*Department of Chemistry, Faculty of Science, Saitama University, Saitama, Saitama 338-8570, Japan

Abstract

Preparation of a series of oligo[thiophene-2,5-diyl]vinylenes (3) is reported. Compounds containing an even number of thiopehene rings were synthesized by the carbonyl coupling of thiophenecarbaldehydes with a low-valent titanium reagent and those carrying an odd number of thiophene rings by the coupling of thiophenecarbaldehydes with Wittig-Horner (Wittig) reagents. Uv-vis spectral feature of these compounds is also reported.