Bulletin of the Chemical Society of Japan p. 864 - 868 (1991)
Update date:2022-07-29
Topics:
Sone, Tyo
Umetsu, Yasuhiro
Sato, Kazuaki
3,4'-Diaryl- and 4,4'-diaryl-2,2'-bithienyls, new classes of mixed thiophene-arene oligomers, were synthesized from 2,5-dichlorothiophene via 4-aryl-2-chlorothiophene in three and two steps, respectively.Namely, a Friedel-Crafts type self-condensation of 4-aryl-2-chlorothiophene, followed by catalytic dechlorination, yielded unsymmetrical bithienyls.Homocoupling of 4-aryl-2-chlorothiophene using a nickel-phosphine catalyst gave symmetrical bithienyls.
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