作者:Natalia P. Alza、Victoria Richmond、Carlos J. Baier、Eleonora Freire、Ricardo Baggio、Ana Paula Murray
DOI:10.1016/j.bmc.2014.06.030
日期:2014.8
from the plant extract in a very good yield (0.15% w/w), we decided to prepare semisynthetic derivatives of this natural diterpenoid through simple structural modifications. A set of twenty new cativic acid derivatives (3–6) was prepared from 1 through transformations on the carboxylic group at C-15, introducing a C2–C6 linker and a tertiary amine group. They were tested for their inhibitory activity
阿尔茨海默氏病(AD)是与记忆力受损和认知障碍相关的神经退行性疾病。当前可用于治疗AD的大多数药物是乙酰胆碱酯酶(AChE)抑制剂。在一项初步研究中,观察到文心茶的乙醇提取物具有显着的AChE抑制作用(IC 50 = 0.79 mg / mL)。这一结果促使我们通过生物测定指导分离分离了活性成分,一种正常的拉丹烷二萜类化合物,被鉴定为17-羟基癸酸(1)。考虑到1表现出对AChE的中等抑制作用(IC 50 = 21.1μM),选择性优于丁酰胆碱酯酶(BChE)(IC 50 (= 171.1μM),并且很容易从植物提取物中获得高收率(0.15%w / w),我们决定通过简单的结构修饰来制备这种天然二萜的半合成衍生物。一组20个新cativic酸衍生物(3 - 6)得自制备1通过对羧基转化在C-15,引入C2-C6接头和叔胺基团。测试了它们对AChE和BChE的抑制活性,并概述了一些构效关系。活性最高的衍生物是化合物3c,IC