Synthesis of V‐Shaped Bis‐coumarins through Aldol Reaction/Double Lactonization Cascade Reaction from Bis(2‐hydroxyphenyl)methanone and Meldrum's Acid
作者:Ding Wang、Zhishuang Ma、Jin Xi、Nana Wang、Tao Wang、Yong Liang、Zunting Zhang
DOI:10.1002/ejoc.202101489
日期:2022.4.5
A concise and efficient method was developed for the synthesis of chromeno[3,4- c ]chromene-6,7-dione using readily available bis(2-hydroxyphenyl)methanone and Meldrum's acid. The protocol displays a broad substrate scope and good functional group tolerance, including alkyl, alkoxyl, aryl and halogens. These π-extended scaffolds showed blue-green fluorescence with a large Stokes shift. The photophysical
使用容易获得的双(2-羟基苯基)甲酮和 Meldrum 酸,开发了一种用于合成色烯[3,4-c]色烯-6,7-二酮的简洁有效的方法。该协议显示了广泛的底物范围和良好的官能团耐受性,包括烷基、烷氧基、芳基和卤素。这些 π 延伸的支架显示出具有大斯托克斯位移的蓝绿色荧光。光物理研究表明,2 位取代的色烯[3,4-c]色烯-6,7-二酮引起了显着的红移。