The efficient synthesis of dibenzo[<i>d</i>,<i>d</i>′]benzo[1,2-<i>b</i>:4,3-<i>b</i>′]dithiophene and cyclopenta[1,2-<i>b</i>:4,3-<i>b</i>′]bis(benzo[<i>d</i>]thiophen)-6-one
作者:Zhihua Wang、Sheng Zhu、Jianwu Shi、Hua Wang
DOI:10.3762/bjoc.5.55
日期:——
3,3'-bi[benzo[b]thiophenyl] as starting material, dibenzo[d,d']benzo[1,2-b:4,3-b']dithiophene, a [5]heterohelicene, was synthesized efficiently in 60% yield via formylation and McMurry reaction. Cyclopenta[1,2-b:4,3-b']bis(benzo[d]thiophen)-6-one, another interesting helical ketone, was also prepared in 79% yield via deprotonation and ketonization of 3,3'-bi[benzo[b]thiophenyl]. In addition, the single-crystal
以3,3'-联[苯并[b]噻吩]为原料,合成了二苯并[d,d']苯并[1,2-b:4,3-b']二噻吩,一种[5]杂螺旋通过甲酰化和 McMurry 反应以 60% 的产率有效地进行。Cyclopenta[1,2-b:4,3-b']bis(benzo[d]thiophen)-6-one 是另一种有趣的螺旋酮,通过 3,3'-的去质子化和酮化也以 79% 的产率制备双[苯并[b]噻吩]。此外,还描述了二苯并[d,d']苯并[1,2-b:4,3-b']二噻吩的单晶结构和两种标题化合物的紫外-可见光谱。