Efficient Two-Step Synthesis of 9-Aryl-6-hydroxy-3<i>H</i>-xanthen-3-one Fluorophores
作者:James P. Bacci、Aaron M. Kearney、David L. Van Vranken
DOI:10.1021/jo051243i
日期:2005.10.1
synthesis of 9-aryl-6-hydroxy-3H-xanthen-3-one fluorophores involving condensation of aryl aldehydes and fluororesorcinol is shown to proceed through a triarylmethane intermediate. The condensation is complicated by retro-Friedel−Crafts reactions which can be minimized by controlling the amount of acid. The xanthenone ring system is prepared by a final oxidative cyclization with DDQ.
显示了涉及芳基醛和氟代间苯二酚缩合的两步合成9-芳基-6-羟基-3 H-黄嘌呤-3-酮荧光团的方法是通过三芳基甲烷中间体进行的。逆向弗里德-克拉夫茨反应会使缩合反应复杂化,可通过控制酸的量使缩合反应最小化。氧杂蒽酮环系是通过用DDQ进行最终的氧化环化反应制得的。