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Synfacts 2005(0): 0023-0023
DOI: 10.1055/s-2005-865371
DOI: 10.1055/s-2005-865371
Synthesis of Heterocycles
© Georg Thieme Verlag Stuttgart · New York
Poly(thiaheterohelicene): A Stiff Conjugated Helical Polymer Comprised of Fused Benzothiophene Rings
T. Iwasaki, Y. Kohinata, H. Nishide*
Waseda University, Tokyo, Japan
Further Information
Publication History
Publication Date:
20 July 2005 (online)
Significance
The first efficient asymmetric synthesis of helical heteroaromatic polymer comprised of fused benzothiophene rings in good chemical yield and stereoselectivity by intramolecular ring-closing condensation starting from inexpensive commercially available starting materials is reported. The synthetic materials form up to 12 helical pitches in the helical structure which is maintained over a wide range of temperatures in a variety of solvents. Chemo-physical properties of the new polymers are described.