Heterocyclic analogs of 5,12-naphthacenequinone 10.* Synthesis of furanoquinizarine and its new derivatives
作者:A. S. Tikhomirov、A. E. Shchekotikhin、Yu. N. Luzikov、A. M. Korolev、M. N. Preobrazhenskaya
DOI:10.1007/s10593-012-0895-4
日期:2012.1
A new method was developed for synthesis of anthra[2,3-b]furan-5,10-dione derivatives. The key compound for annelation of the furan fragment to the anthraquinone chromophor is the previously unknown analog of salicylaldehyde, 1,4-dimethoxy-3-formyl-2-hydroxyanthraquinone, which we have synthesized by the Miller–Loudon–Schneider reaction. A chain of sequential transformations was used for its conversion
开发了一种合成蒽[2,3 - b ]呋喃-5,10-二酮衍生物的新方法。呋喃片段与蒽醌发色团的脱嵌反应的关键化合物是以前未知的水杨醛类似物1,4-二甲氧基-3-甲酰基-2-羟基蒽醌,我们已经通过Miller-Loudon-Schneider反应合成了类似物。使用一连串的转化链将其转化为目标4,11-二羟基蒽[2,3- b ]呋喃-5,10-二酮(呋喃喹啉):起始甲酰基羟基蒽醌与溴乙酸酯的O-烷基化,环-碱存在下使3-甲氧基蒽醌-2-基乙酸酯脱水,将所得酯水解为4,11-二甲氧基-5,10-dioxo-5,10-二氢蒽[2,3- b所得的4,11-二甲氧基蒽[2,3 - b ]呋喃-5,10-二酮的]呋喃-2-羧酸及其脱羧和脱甲基。