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■ Preparation of α-Quinque- and α-Septithiophenes and Their Positional Isomers

Juzo Nakayama, Yoichi Nakamura, Shigeru Murabayashi, and Masamatsu Hoshino

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

Abstract

α-Quinque- and α-septithiophenes were synthesized in four steps starting from α-bi- and α-terthiophenes, respectively. One of positional isomers of each oligothiophene described above is also synthesized.