Synthesis and antibacterial activity of emodin and its derivatives against methicillin-resistant Staphylococcus aureus
作者:Thidarat Chalothorn、Vatcharin Rukachaisirikul、Souwalak Phongpaichit、Sakawrat Pannara、Chittreeya Tansakul
DOI:10.1016/j.tetlet.2019.151004
日期:2019.8
Synthesis of the antibacterial emodin was improved using Friedel-Crafts acylation as a key step leading to 37% overall yield. In addition, 21 analogues were synthesized by structural modification of the hydroxyl and methyl groups, as well as the aromatic ring of emodin. Antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA) and cytotoxicity against noncancerous Vero cells
使用Friedel-Crafts酰化反应作为关键步骤可提高抗菌素大黄素的合成,从而使总收率达到37%。此外,通过对大黄素的羟基和甲基以及芳香环进行结构修饰,合成了21种类似物。耐甲氧西林金黄色葡萄球菌的抗菌活性(MRSA)和针对非癌性Vero细胞的细胞毒性进行了评估。结构-活性关系(SAR)研究表明,大黄素骨架中的羟基和甲基对于抗MRSA活性至关重要。此外,芳环上碘原子或乙基氨基的存在以更高的选择性指数增强了抗MRSA的活性,而含溴,氯原子或季铵盐的衍生物则与大黄素一样具有活性。芳香环上的季铵基团还导致了对Vero细胞的非细胞毒性。