Synthesis and Structure of Sulfur-Bridged [1<sub>·<i>n</i></sub>](2,5)Thiophenophanes (<i>n</i>= 4—6)
作者:Naoki Katano、Yoshiaki Sugihara、Akihiko Ishii、Juzo Nakayama
DOI:10.1246/bcsj.71.2695
日期:1998.11
Sulfur-bridged [1·n](2,5)thiophenophanes (n = 4—6) were prepared by cyclization of dibromo derivatives of the corresponding linear oligo(thio-2,5-thienylenes) (1) on reactions with Na2S. The best results were obtained by heating 1 and Na2S in the presence of Cs2CO3 in NMP (24% yield for n = 4, 16% for n = 5, and 10% for n = 6). The reactions gave less satisfactory results either in the presence of
硫桥联的 [1·n](2,5) 噻吩 (n = 4-6) 是通过相应的线性低聚(硫代-2,5-噻吩基) (1) 的二溴衍生物与 Na2S 反应而制备的。通过在 NMP 中存在 Cs2CO3 的情况下加热 1 和 Na2S 获得最佳结果(n = 4 的产率为 24%,n = 5 的产率为 16%,n = 6 的产率为 10%)。在存在 CuI (Cu2O) 或不存在这些添加剂的情况下,这些反应的结果不太令人满意。还报告了这三种化合物的 X 射线结构分析结果。