Syntheses of 3',4'-dihydroxy-5,6,7- and 5,7,8-trioxygenated 3',4'-dihydroxy flavones having alkoxy groups and their inhibitory activities against arachidonate 5-lipoxygenase
作者:Tokunaru Horie、Masao Tsukayama、Hiroki Kourai、Chieko Yokoyama、Masayuki Furukawa、Tanihiro Yoshimoto、Shozo Yamamoto、Shigekatsu Watanabe-Kohno、Katsuya Ohata
DOI:10.1021/jm00161a021
日期:1986.11
Arachidonate 5-lipoxygenase plays a pivotal role in the biosynthesis of leukotrienes. Cirsiliol (3',4',5-trihydroxy-6,7-dimethoxyflavone), a selective inhibitor of the enzyme, was derivatized by introducing alkyl groups of various chain lengths at positions 5, 6, 7, and 8 of the A ring of the flavone skeleton. Modification of the positions 5 and 6 with an alkyl group of 5-10 carbons markedly decreased
花生四烯酸5-脂氧合酶在白三烯的生物合成中起关键作用。通过在A环的5、6、7和8位上引入各种链长的烷基,可以衍生化酶的选择性抑制剂Cirsiliol(3',4',5-三羟基-6,7-二甲氧基黄酮)黄酮骨架。用5-10个碳的烷基修饰位置5和6,将5-脂氧合酶抑制作用的IC50值明显降低至10 nM。如用5-或6-己氧基氧基衍生物测试,显示了对5-脂氧合酶的相对选择性的抑制。抑制12-脂氧合酶需要这些化合物的浓度更高,而环氧合酶则没有被抑制。修饰7和8位不会增加大多数黄酮类化合物的抑制作用。