The invention provides a series of halogenated tetracyclic triterpene derivatives and their preparation and application. It is represented by the following general structural formula:
wherein R1 is halogen, R2 is H, and the halogen is selected from fluorine, chlorine, bromine or iodine; or R1 and R2 are each fluorine, and R3 is an amine, alcohol, amino acid, peptide or phosphate linked to oxygen through an acyl group.
The derivatives of the present invention are relatively stable in rat whole blood through pharmacokinetic studies. The absolute bioavailability after a single intragastric administration for male and female rats was 15.6% and 28.4% respectively. The mean bioavailability was 22%. The derivatives of the present invention showed better in vivo activities compared with the existing standard drugs enalapril and sacubitril valsartan sodium. Meanwhile, hydrophilic prodrugs of the tetracyclic triterpenoid derivatives in the present invention were prepared, which improved the solubility and had better drug-likeness properties. The derivatives of the present invention can be used for preparing cardiovascular medicines and have great application value.
本发明提供了一系列卤代四环三萜衍
生物及其制备和应用。其结构通式如下:
其中 R1 为卤素,R2 为 H,卤素选自
氟、
氯、
溴或
碘;或 R1 和 R2 各为
氟,R3 为通过酰基与氧相连的胺、醇、
氨基酸、肽或
磷酸。
通过药代动力学研究,本发明的衍
生物在大鼠全血中相对稳定。雄性和雌性大鼠一次胃内给药后的绝对
生物利用度分别为 15.6% 和 28.4%。平均
生物利用率为 22%。与现有的标准药物
依那普利和沙库比妥
缬沙坦钠相比,本发明的衍
生物显示出更好的体内活性。同时,本发明中四环三
萜类衍
生物亲
水性原药的制备,提高了溶解度,具有更好的药物相似性。本发明的衍
生物可用于制备心血管药物,具有很大的应用价值。