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论文类型：期刊论文

发表时间：2015-03-02

发表刊物：CHEMISTRY-A EUROPEAN JOURNAL

收录刊物：SCIE、EI、PubMed、Scopus

卷号：21

期号：10

页面范围：4065-4070

ISSN号：0947-6539

关键字：aryldiynes; cyclization; domino reactions; indeno[1,2-c]chromenes; organic dyes; triflic acid

摘要：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 ortho-thioanisole-substituted aryldiynes. A new class of organic dyes with the indeno[1,2-c] chromene framework as both donor and pi-linker were synthesized. These compounds exhibit high photovoltaic performances in dye-sensitized solar cells (DSCs).