Regioselective Synthesis of Tetraphenyl-1,3-butadienes with Aggregation-Induced Emission

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• 作者：Yamuna Ezhumalai ; Tsai-Hui Wang ; Hsiu-Fu Hsu
• 刊名：Organic Letters
• 出版年：2015
• 出版时间：February 6, 2015
• 年：2015
• 卷：17
• 期：3
• 页码：536-539
• 全文大小：321K
• ISSN：1523-7052

文摘

In the presence of substoichiometric amounts of Co₂(CO)₈, internal bisarylalkynes undergo reductive dimerization with good to excellent yields. The Co₂(CO)₈-induced reactions described are experimentally quite simple and provide a very useful synthetic procedure for the synthesis of tetraphenylbutadienes which exhibit aggregation-induced emission enhancement, i.e., weak emission in good solvents but strong fluorescence in solvents that lead toward formation of aggregates or in the solid state.