Positively charged water-soluble prodrugs of n-arylanthranilic acids with very fast skin penetration rate
申请人:Techfields Biochem Co. Ltd
公开号:EP2623495A1
公开(公告)日:2013-08-07
The novel positively charged pro-drugs of arylanthranilic acids 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 mefenamic acid, meclofenamic acid, flufenamic acid, niflumic acid, flunixin, and related compounds, by reaction with suitable alcohols, thiols, or amines and coupling reagents, such as N, N'-Dicyclohexylcarbodiimide, N, N'-Diisopropylcarbodiimide, O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate, O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate, Benzotriazol-1-yl-oxy-tris (dimethylamino)phosphonium hexafluorophosphate, et al. 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 pushes the pro-drug into the cytosol. The results suggest that the pro-drugs diffuses through human skin -200 times faster than does mefenamic acid, meclofenamic acid, flufenamic acid, niflumic acid, flunixin, and related compounds. It takes 2-4 hours for mefenamic acid, meclofenamic acid, flufenamic acid, niflumic acid, flunixin, and related compounds to reach the peak plasma level when they are taken orally, but these prodrugs only took about -50 minutes to reach the peak plasma level when they are taken transdermally. In plasma, more than 90% of these pro-drugs can change back to the parent drugs in a few minutes. The prodrugs can be used medicinally in treating any NSAIAs-treatable conditions in humans or animals. The prodrugs can be administered not only orally, but also transdermally for any kind of medical treatments and thus avoid most of the side effects of NSAIAs, most notably GI disturbances such as dyspepsia, gastroduodenal bleeding, gastric ulcerations, and gastritis. Controlled transdermal administration systems of the prodrug enables mefenamic acid, meclofenamic acid, flufenamic acid, niflumic acid, flunixin, and related compounds to reach constantly optimal therapeutic blood levels to increase effectiveness and reduce the side effects of mefenamic acid, meclofenamic acid, flufenamic acid, niflumic acid, flunixin, and related compounds. Another great benefit of transdermal administration of these pro-drugs is that administering medication, especially to children, will be much easier.
设计并合成了通式(1)"结构 1 "中的新型带正电的芳兰二酸原药。上述通式(1)'结构 1'化合物可以由甲灭酸,甲氯灭酸,氟灭酸,硝氟酸,氟尼辛和相关化合物通过与合适的醇、硫醇或胺和偶联试剂(如 N. N'-二环己基碳二亚基)反应制备、N,N'-二环己基碳二亚胺、N,N'-二异丙基碳二亚胺、O-(苯并三唑-1-基)-N,N,N',N'-四甲基脲四氟硼酸盐、O-(苯并三唑-1-基)-N,N,N',N'-四甲基脲六氟磷酸盐、苯并三唑-1-基氧基-三(二甲基氨基)鏻六氟磷酸盐等。这些原药带正电荷的氨基不仅在很大程度上增加了药物的溶解度,还与膜上磷酸头基的负电荷结合,将原药推入细胞质。研究结果表明,原药在人体皮肤中的扩散速度是甲灭酸,甲氯灭酸,氟灭酸,硝氟酸,氟尼辛和相关化合物的 200 倍。口服甲灭酸,甲氯灭酸,氟灭酸,硝氟米酸,氟尼辛和相关化合物需要 2-4 小时才能达到血浆峰值水平,但经皮服用这些原药只需约 -50 分钟就能达到血浆峰值水平。在血浆中,90% 以上的原药可在几分钟内变回母药。这些原药可用于治疗人类或动物的任何非甾体抗炎药物可治疗的疾病。原药不仅可以口服,还可以透皮给药,用于任何类型的医疗,从而避免非甾体抗炎药的大部分副作用,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甲灭酸,甲氯灭酸,氟灭酸,硝氟米酸,氟尼辛和相关化合物不断达到最佳治疗血药浓度,从而提高甲灭酸,甲氯灭酸,氟灭酸,硝氟米酸,氟尼辛和相关化合物的疗效并减少其副作用。这些原药透皮给药的另一大好处是,给药,尤其是给儿童给药,将变得更加容易。