Triflic Acid Mediated Cascade Cyclization of Aryldiynes for the Synthesis of Indeno[1,2-<i>c</i>]chromenes: Application to Dye-Sensitized Solar Cells
作者:Hua Jiang、Giovanni Ferrara、Xuan Zhang、Kazuaki Oniwa、Ashraful Islam、Liyuan Han、Ying-Ji Sun、Ming Bao、Naoki Asao、Yoshinori Yamamoto、Tienan Jin
DOI:10.1002/chem.201405860
日期:2015.3.2
A new triflic acid (TfOH)‐mediated cascade cyclization of ortho‐anisole‐substituted aryldiynes is described for the construction of indeno[1,2‐c]chromenes. The cascade cyclization proceeds through an unusual TfOH‐induced alkyne‐alkyne cyclization followed by nucleophilic attack of the methoxy group on the benzylidene cation, which is completely different to the cyclization of ortho‐aniline‐ or ort
描述了一种新的由三氟甲磺酸(TfOH)介导的邻苯甲醚取代的芳基二炔的级联环化反应,用于构建茚并[1,2- c ]苯二酮。级联环化是通过不寻常的TfOH诱导的炔烃-炔烃环化进行的,随后甲氧基对苄叉基阳离子的亲核攻击,这与邻苯胺或邻苯硫基苯甲醚取代的芳基二炔的环化完全不同。合成了以茚并[1,2- c ]亚甲基骨架为供体和π-连接基的一类新型有机染料。这些化合物在染料敏化太阳能电池(DSC)中表现出很高的光伏性能。