Synthesis and Selfassambling of Amphiphilic Oligoesters Based on Pyromellitic Acid

The method for synthesis of a new class of amphiphilic oligoesters of pyromellitic acid is developed. As hydrophilic fragments polyethylene glycols or polyethylene glycol mono methyl ethers were used, as lipophilic ones – primary fatty alcohols or cholesterol. The structure of the synthesized oligoesters was confirmed by IR- and PMR-spectroscopy. The oligoesters could solubilize water-insoluble substances, for example such effective antitumor lipophilic drug as curcumin.

Amphiphilic cholesterol containing polymers for drug delivery systems

The interaction of binary copolymers poly(maleic anhydride-co-poly(ethylene glycol) methyl ether methacrylate) with cholesterol results in formation of cholesterol containing polymers, which contain from 4.6 to 46.0 mol % monocholesteryl maleic links. Their structure was confirmed using functional analysis and IR spectroscopy. Acidic and anhydride links of these copolymers form polymeric salts if react with alkali. These salts are surfactants which in aqueous medium form a hierarchy micelles and micellar aggregates depending on the copolymer concentration.