Synthesis and evaluation of bioactive naphthoquinones from the Brazilian medicinal plant, Tabebuia avellanedae
作者:Mitsuaki Yamashita、Masafumi Kaneko、Harukuni Tokuda、Katsumi Nishimura、Yuko Kumeda、Akira Iida
DOI:10.1016/j.bmc.2009.07.039
日期:2009.9.1
A series of naphthoquinones based on the naphtho[2,3-b]furan-4,9-dione skeleton such as (−)-5-hydroxy-2-(1′-hydoxyethyl)naphtho[2,3-b]furan-4,9-dione (1) and its positional isomer, (−)-8-hydroxy-2-(1′-hydoxyethyl)naphtho[2,3-b]furan-4,9-dione (2), which are secondary metabolites found in the inner bark of Tabebuia avellanedae, were stereoselectively synthesized and their biological activities were
基于萘并[2,3 - b ]呋喃-4,9-二酮骨架的一系列萘醌,例如(-)-5-羟基-2-(1'-羟乙基)萘并[2,3- b ]呋喃-4,9-二酮(1)及其位置异构体(-)-8-羟基-2-(1'-羟乙基)萘并[2,3 - b ]呋喃-4,9-二酮(2),是在塔伯布烟草(Tabebuia avellanedae)内树皮中发现的次级代谢产物,是立体选择性合成的,并与相应的对映异构体的生物学活性一起进行了生物活性评估。化合物1表现出对几种人类肿瘤细胞系的有效抗增殖作用,但对某些人类正常细胞系的作用远低于丝裂霉素。另一方面,其对映异构体(R)-1对上述肿瘤细胞系的活性低于1。2对所有肿瘤细胞系的抗增殖作用显着降低。这些结果表明,在C-5处酚羟基的存在对于增加抗增殖作用非常重要。此外,1个也显示出比2个更高的化学预防活性,而1和2之间没有显着差异。抗菌活性。两种化合物均显示出适度的抗真菌和抗菌活性(