Because of the formation of disulfide bridges with mucus glycoproteins, the mucoadhesive properties of polymeric compounds can be significantly improved by the covalent attachment of thiol substructures to them. By the transformation of free thiol groups on such polymers in disulfides with mercaptonicotinamides or mercaptopyridoxins these thiol groups become comparatively more reactive resulting in significantly improved mucoadhesive properties. Furthermore, polymers exhibiting disulfide partialstructures with mercaptonicotinamides or mercaptopyridoxins do not need to be protected against oxidation. In addition, they show comparatively higher permeation enhancing properties.
由于与黏液糖蛋白形成二
硫键,聚合物化合物的粘附性能可以通过将巯基亚结构共价附加到它们上来显着改善。通过将这些聚合物上的游离巯基转化为巯基烟酰胺或巯基
吡哆醇中的二
硫化物,这些巯基变得更具反应性,从而显着改善了粘附性能。此外,具有巯基烟酰胺或巯基
吡哆醇的二
硫化物部分结构的聚合物不需要受到氧化的保护。此外,它们表现出相对较高的渗透增强性能。