Total Synthesis of a Natural Antioxidant and Structure-Activity Relationships of Related Compounds.
作者:Shuji JINNO、Naomi OTSUKA、Takaaki OKITA、Kuniyo INOUYE
DOI:10.1248/cpb.47.1276
日期:——
A total synthesis of benzodioxole derivative 1 was achieved via a palladium(0)-catalyzed cross-coupling reaction in a 68% overall yield (4 steps). A novel series of benzodioxoles bearing a variety of aromatic and heterocyclic rings was also prepared and the antioxidative activity evaluated using in vitro model systems. Structure-activity studies revealed that i) intramolecular hydrogen-bonding in the
通过钯(0)催化的交叉偶联反应以68%的总收率(4个步骤)实现了苯并二恶唑衍生物1的全合成。还制备了一系列带有各种芳族和杂环的新型苯并二恶唑,并使用体外模型系统评估了其抗氧化活性。结构活性研究表明:i)酚部分中的分子内氢键降低了活性,ii)相对于酚的邻位引入取代基增加了活性,并且iii)亚甲二氧基官能团有助于苯氧基的稳定化。在这些化合物中,5,7-二-(4-甲氧基苯基)-4-甲氧基-6-羟基-1,3-苯并二恶唑(7p)是最有利的试剂,并且比没食子酸正丙酯更有效。