Preparation and Route of Asterriquinone Monoalkyl Ether from Asterriquinone Diacetate by Treatment with a Mixture of Alcohol and Alkali, Followed by Acidification.
作者:Akira KAJI、Ryo SAITO、Yukako HATA(nee SHINBO)、Noriki KIRIYAMA
DOI:10.1248/cpb.47.77
日期:——
3-Alkoxy-6-hydroxy-p-benzoquinones were prepared by the treatment of 3, 6-diacetoxy-p-benzoquinones with a mixture of alcohol and alkali, followed by acidification. The key intermediate acetoxy-alkoxy-p-benzoquinones were formed by the base-catalyzed addition of an alkoxy anion to the conjugated double bonds in the diacetoxy-p-benzoquinone ring, followed by an acetoxy anion elimination. This method was applied for preparing a novel o-quinone derivative of asterriquinone (ARQ) by the addition of 2-haloethanol and intramolecular O-alkylation.
3-烷氧基-6-羟基-p-苯醌通过将3,6-二醋氧基-p-苯醌与醇和碱的混合物处理,然后酸化制备而成。关键中间体醋氧基-烷氧基-p-苯醌是通过碱催化将烷氧基阴离子加成到二醋氧基-p-苯醌环中的共轭双键,随后进行醋氧基阴离子消除而形成的。这种方法被应用于制备一种新型的o-醌衍生物阿斯特里奎诺(ARQ),通过添加2-卤代乙醇和分子内O-烷基化实现。