Studies on quinones. Part 35: Access to antiprotozoal active euryfurylquinones and hydroquinones
作者:Jaime A. Valderrama、Julio Benites、Manuel Cortés、David Pessoa-Mahana、Eric Prina、Alain Fournet
DOI:10.1016/s0040-4020(01)01186-3
日期:2002.1
(+)-Euryfuran adds regiospecifically to activated monosubstituted 1,4-benzoquinones under mild conditions to give the corresponding Michael adducts which, depending on the quinone substituent, undergo in situ redox reactions to the respective euryfuryl-benzoquinones. One of these Michael adducts undergoes a facile stereoselective cyclisation under oxidant conditions to afford a naphthofuro[4,3-c]benzopyran derivative. The in vitro activities of the obtained euryfurylquinones and hydroquinones against Leishmania amazonensis are described. (C) 2002 Elsevier Science Ltd. All rights reserved.
(+)-欧诺吡喃在温和条件下与活化的单取代1,4-苯醌以区域选择性加成,生成相应的迈克尔加成物。这些加成物根据苯醌上的取代基,在原位发生氧化还原反应,转化生成相应的欧诺吡喃基苯醌。其中一种迈克尔加成物在氧化剂存在下通过简便的立体选择性环化反应,获得一种萘喃[4,3-c]苯并吡喃类衍生物。所得欧诺吡喃基苯醌及对甲酚类化合物针对利什曼原虫的体外活性研究结果亦予描述。 (C)2002 Elsevier Science Ltd. 保留所有权利。