Efficient synthesis and structure–activity relationship of honokiol, a neurotrophic biphenyl-type neolignan
作者:Tomoyuki Esumi、Gouki Makado、Haifeng Zhai、Yasuhiro Shimizu、Yasuhide Mitsumoto、Yoshiyasu Fukuyama
DOI:10.1016/j.bmcl.2004.02.067
日期:2004.5
Honokiol, a biphenyl-type neolignan, which shows the remarkable neurotrophic effect in primary cultured rat cortical neurons, has been effectively synthesized in 21% yield over 14 steps starting from 5-bromosalicylic acid and p-hydroxybenzoic acid by utilizing Pd-catalyzed Suzuki-Miyaura coupling reaction as a key step. Additionally, the structure-activity relationship between neurite outgrowth-promoting activity and its O-methylated and/or its hydrogenated analogues was examined in the primary cultures of fetal rat cortical neurons, suggesting that 5-allyl and T-hydroxyl groups are essential for affecting the neurotrophic activity of honokiol. (C) 2004 Elsevier Ltd. All rights reserved.