申请人:Techfields Biochem Co. Ltd
公开号:EP2610242A1
公开(公告)日:2013-07-03
The novel positively charged prodrugs of acetylsalicylic acid and its analogues in the general formula(1) 'Structure 1' were designed and synthesized. The compounds of the general formula(1) 'Structure 1' indicated above can be prepared from functional derivatives of ASA or its analogues,(for example acid halides or mixed anhydrides), by reaction with suitable alcohols, thiols, or amines. The positively charged amino groups of these pro-drugs not only largely increases the solubility of the drugs, but also bonds to the negative charge on the phosphate head group of membranes and push the pro-drug into the cytosol. The experiment results suggest that the pro-drug, diethylaminoethyl acetylsalicylate. AcOH, diffuses through human skin -400 times faster than acetylsalicylic acid itself and ∼100 times faster than ethyl acetylsalicylate. In plasma, 80% of these pro-drugs can change back to the drug in a few minutes. The pro-drugs can be used medicinally in treating any aspirin-treatable conditions in humans or animals and be administered not only orally, but also transdermally for any kind of medical treatments and avoid most of the side effects of aspirin, most notably GI disturbances such as dyspepsia, gastroduodenal bleeding, gastric ulcerations, and gastritis. Controlled transdermal administration systems of the prodrug enables the aspirin to reach constantly optimal therapeutic blood levels to increase effectiveness and reduce the side effects of aspirin.
设计并合成了带正电荷的新型乙酰水杨酸原药及其通式(1)"结构 1 "中的类似物。上述通式(1)"结构 1 "化合物可由 ASA 或其类似物的功能性衍生物(如酸卤化物或混合酸酐)与适当的醇、硫醇或胺反应制备而成。这些原药带正电荷的氨基不仅能大大增加药物的溶解度,还能与膜上磷酸头基的负电荷结合,将原药推入细胞质中。实验结果表明,原药乙酰水杨酸二乙氨基乙酯(Diethylaminoethyl acetylsalicylate.AcOH 在人体皮肤中的扩散速度比乙酰水杨酸本身快 400 倍,比乙酰水杨酸乙酯快 100 倍。在血浆中,80% 的原药可在几分钟内变回药物。这些原药可用于治疗人类或动物的任何阿司匹林可治疗的疾病,不仅可以口服,还可以透皮给药,用于任何类型的医疗,并可避免阿司匹林的大部分副作用,尤其是消化道紊乱,如消化不良、胃十二指肠出血、胃溃疡和胃炎。原药的可控透皮给药系统可使阿司匹林不断达到最佳治疗血药浓度,从而提高疗效并减少阿司匹林的副作用。