Synthesis of New Bicyclic Quinones: 2<i>H</i>-1-Benzopyran-5,8-quinones and Related Compounds
作者:Olivia Reinaud、Patrice Capdevielle、Michel Maumy
DOI:10.1055/s-1987-28075
日期:——
The synthesis of new 2H-1-benzopyran-5,8-quinones has been realized in three steps from p-methoxyphenol with 84-88% overall yield. It consists at first in a regioselective nucleophilic substitution of propargyl alcoholates on an appropriate 4,5-disubstituted o-quinone (obtained by copper-catalyzed oxidation of p-methoxyphenol) and subsequently in a thermal isomerization. Relative stabilities of title compounds are described, as well as several transformation products.
以对甲氧基苯酚为原料,分三步合成了新的 2H-1-苯并吡喃-5,8-醌,总收率为 84-88%。首先是丙炔醇酸酯对适当的 4,5-二取代邻醌(通过铜催化对甲氧基苯酚的氧化作用获得)进行区域选择性亲核取代,然后进行热异构化。本文介绍了标题化合物的相对稳定性以及几种转化产物。