Abstract
Three kinds of 4-hydroxycoumarin derivatives, namely, biscoumarins
(1–4), epoxydicoumarins (5–8) and dihydropyrans (9–12),
were synthesized and the antibacterial activity of each of them was
evaluated. The result of preliminary bioassay shows that the lowest
minimal inhibitory concentration (MIC) of compounds 1 and 2
against drug-sensitive S. aureus (ATCC 29213) and
methicillin-resistant S. aureus (MRSA XJ 75302, Mu50, ATCC
700699 and USA 300) is 4–64 ug/mL. Additionally, there
are two classical intramolecular
O—H⋯O
hydrogen bonds (HBs) in the structures of biscoumarins (1–4), and
their corresponding HB energies were further calculated by the density
functional theory (DFT) [B3LYP/6-31G*] method.
摘要:合成了三种4-羟基香豆素衍生物,分别为双香豆素(1-4)、环氧双香豆素(5-8)和二氢吡喃(9-12),并评估了它们的抗菌活性。初步生物测定结果显示,化合物1和2对药物敏感型金黄色葡萄球菌(ATCC 29213)和耐甲氧西林金黄色葡萄球菌(MRSA XJ 75302、Mu50、ATCC 700699和USA 300)的最低最小抑制浓度(MIC)为4-64 ug/mL。此外,双香豆素(1-4)的结构中存在两个经典的分子内O—H⋯O氢键(HBs),并且它们的对应HB能量进一步通过密度泛函理论(DFT)[B3LYP/6-31G*]方法计算。