Isoxazole analogs of curcuminoids with highly potent multidrug-resistant antimycobacterial activity
作者:Chatchawan Changtam、Poonpilas Hongmanee、Apichart Suksamrarn
DOI:10.1016/j.ejmech.2010.07.003
日期:2010.10
bisdemethoxycurcumin (3), the curcuminoid constituents of the medicinal plant Curcuma longa L., have been structurally modified to 55 analogs and antimycobacterial activity against Mycobacterium tuberculosis has been evaluated. Among the highly active curcuminoids, the isoxazole analogs are the most active group, with mono-O-methylcurcumin isoxazole (53) being the most active compound (MIC 0.09 μg/mL). It was
姜黄素(1),去甲氧基姜黄素(2)和双去甲氧基姜黄素(3)(药用植物姜黄的姜黄素成分)已在结构上修饰为55个类似物,并已评估了其对结核分枝杆菌的抗分枝杆菌活性。在高活性姜黄素类化合物中,异恶唑类似物是活性最高的基团,单-O-甲基姜黄素异恶唑(53)是活性最高的化合物(MIC 0.09μg/ mL)。它的活性比母体化合物姜黄素(1)高1131倍,分别比标准药物卡那霉素和异烟肼高18倍和2倍。化合物53还显示出对耐多药结核分枝杆菌临床分离株的高活性,MIC值为0.195–3.125μg/ mL。姜黄素类似物表现出抗分枝杆菌活性的结构要求是在异戊基环上存在一个异恶唑环和两个不饱和键。紧密连接于异恶唑环的氮官能团的芳环上合适的对烷氧基的存在和另一个芳环上的游离对羟基的存在增强了生物活性。