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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
B(C6F5)3-Catalyzed [4 + 2] Cyclization Strategy: Synthesis and Photophysical Properties of
Hong Xu1,2,3, Bei Wang1,2,3, Fu-Yu Li1,2,3
1Department of Chemistry, Xihua University, Chengdu 610039, P. R. China.
Abstract:
In this paper, a series of novel carbazolequinones were efficiently obtained by a B(C6F5)3-catalyzed [4 + 2] cyclization reaction. This protocol not only had a simple operation, broad substrate range, and high atomic economy, but also had a low catalyst loading and avoided using metal catalysts. In addition, we constructed diverse new carbazole-fused compounds under different reduction conditions. The results of photophysical characterization showed that the structure of carbazole-fused derivatives had a significant impact on the fluorescence properties.
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