This study was designed to synthesize and evaluate derivatives of scopolamine (1) as acetylcholine esterase and protease inhibitors. Scopolamine (1) was extracted from the aerial parts of Datura innoxia through bioassay guided fractionation. Five different derivatives of scopolamine (1) were synthesized, and identified through spectroscopic studies. Their acetylcholine esterase (AChE) and trypsin inhibitory potentials were determined through standard protocols and evaluated from the perspective of structure-activity relationship. The synthesized scopolamine derivatives (2-6) showed remarkable AChE inhibitory activity, except for scopoline (6). The results showed higher enzyme inhibition potential of the synthesized compounds (2-5) as compared to scopolamine (1). Maximum inhibition was exhibited by scopolamine N-oxide (89.9 \pm 1.2%, IC_50} = 37.4 \pm 1.1 \mu M)), followed by scopolamine sulfonic acid (70.3 \pm 0.8%, IC_50} = 46.9 \pm 1.0 \mu M) and O-methyl scopolamine (66.1 \pm 1.2%, IC_50} = 94.7 \pm 0.8 \mu M). All derivatives showed moderate activity against trypsin; maximum activity was exhibited by 6 (54.0 \pm 1.4%) with IC_50} = 621.2 \pm 3.7 \mu M.
本研究旨在合成
东莨菪碱(1)的衍
生物并对其作为
乙酰胆碱酯酶和蛋白酶抑制剂进行评估。
东莨菪碱(1)是通过
生物测定法从曼陀罗(Datura innoxia)的气生部分提取出来的。 合成了五种不同的
东莨菪碱(1)衍
生物,并通过光谱研究进行了鉴定。 通过标准方案测定了它们的
乙酰胆碱酯酶(AChE)和胰
蛋白酶抑制潜能,并从结构-活性关系的角度对其进行了评估。 除
东莨菪碱(6)外,合成的
东莨菪碱衍
生物(2-6)均具有显著的
乙酰胆碱酯酶抑制活性。 结果表明,与
东莨菪碱(1)相比,合成的化合物(2-5)具有更高的酶抑制潜力。
东莨菪碱 N-氧化物(89.9 \pm 1.2%,IC_50} = 37.4 \pm 1.1 \mu M)的抑制率最高,其次是
东莨菪碱磺酸(70.3 \pm 0.8%,IC_50} = 46.9 \pm 1.0 \mu M)和 O-甲基
东莨菪碱(66.1 \pm 1.2%,IC_50} = 94.7 \pm 0.8 \mu M)。 所有衍
生物对胰
蛋白酶都显示出中等程度的活性;其中 6 号衍
生物(54.0 \pm 1.4%)的活性最高,IC_50} = 621.2 \pm 3.7 \mu M。