Novel acid-sensitive compounds comprising at least one hydrophilic substituent and a cyclic ortho-ester which is acid-sensitive, and their salts. These compounds are useful for forming conjugates (liposomes, complexes, nanoparticles and the like) with biologically active substances and releasing them into cellular tissues or compartments whose pH is acidic, or as nonionic surfactant for stabilizing particles encapsulating a biologically active substance and then destabilizing them in acid medium, or alternatively as a vector covalently linked to a therapeutic molecule so as to release said therapeutic molecule into the cellular tissues or compartments whose pH is acidic.
本发明涉及一种酸敏感的新型化合物,其中包括至少一个亲
水性取代基和一个酸敏感的环状正交酯,以及它们的盐。这些化合物可用于与
生物活性物质形成共轭物(脂质体、复合物、纳米粒子等),并将它们释放到pH值为酸性的细胞组织或区域中,或作为非离子表面活性剂,用于稳定包含
生物活性物质的粒子,然后在酸性介质中使其不稳定,或作为与治疗分子共价连接的载体,以便将所述治疗分子释放到pH值为酸性的细胞组织或区域中。