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Paper | Regular issue | Vol 78, No. 12, 2009, pp.3037-3051
Published online, 18th September, 2009
DOI: 10.3987/COM-09-11824
Preparation of 1,4-Bis(3-ethynylthieno[3,2-b]thiophen-2-yl)benzene Derivatives as Peptide-Inspired Molecules

Kozo Toyota,* Hiroshi Katsuta, Yasutomo Tsuji, Takeaki Iwamoto, and Noboru Morita

*Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan

Abstract

1,4-Bis(3-ethynylthieno[3,2-b]thiophen-2-yl)benzene derivatives, as well as 1-(3-ethynylthieno[3,2-b]thiophen-2-yl)-4-(2-ethynyl-3-thienyl)benzene derivative and 2,5-bis(2-ethynyl-3-thienyl)thieno[3,2-b]thiophene derivative, containing thieno[3,2-b]thiophene moieties with pseudoaxis, was prepared and their UV-vis spectra were studied. Extension of π-system through the central aromatic ring was suggested by the UV-vis spectra.