Synthesis and Structure-Activity Relationships of Phaffiaol and Related Antioxidants.
作者:Shuji JINNO、Takaaki OKITA
DOI:10.1248/cpb.46.1688
日期:——
Total synthesis of a novel long chain alkyl phenol, phaffiaol (1), a potent antioxidant isolated from Phaffia rhodozyma, was achieved via three reaction steps starting from 3, 5-dibromosalicylaldehyde (2). We also prepared several types of long chain alkyl phenol having different aromatic rings or different carbon length, and evaluated their antioxidative activity using the rabbit erythrocyte membrane ghost system. Amongst these compounds, the novel methoxy phenol derivatives (6c, d, 7) having a heptadecyl moiety at the ortho-position to the hydroxy group, were approximately 2 times more active than α-tocopherol. In addition, 4-methoxy-2-pentadexylphenol (10h), which has a 15-carbon length in the side chain moiety, showed the maximum activity.
通过从3,5-二溴水杨醛(2)开始的三个反应步骤,实现了从Phaffia rhodozyma中分离得到的强效抗氧化剂phaffiaol(1)这一新型长链烷基酚的完全合成。我们还制备了几种具有不同芳环或不同碳链长度的长链烷基酚,并通过兔红细胞膜系统评估了它们的抗氧化活性。在这些化合物中,具有十七烷基侧链且位于羟基邻位的甲氧基酚衍生物(6c、d、7)的活性约为α-生育酚的两倍。此外,侧链具有15个碳原子的4-甲氧基-2-十五烷基酚(10h)显示出最高的活性。