Synthesis of 3,4′-Diaryl- and 4,4′-Diaryl-2,2′-bithienyls from 2,5-Dichlorothiophene
作者:Tyo Sone、Yasuhiro Umetsu、Kazuaki Sato
DOI:10.1246/bcsj.64.864
日期:1991.3
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
3,4'-二芳基-和 4,4'-二芳基-2,2'-二噻吩基,新类别的混合噻吩-芳烃低聚物,由 2,5-二氯噻吩通过 4-芳基-2-氯噻吩在三个过程中合成和两个步骤,分别。即,4-芳基-2-氯噻吩的Friedel-Crafts 型自缩合,然后催化脱氯,产生不对称的二噻吩基。使用镍-膦催化剂对 4-芳基-2-氯噻吩进行均偶联得到对称的二噻吩基。