[Esters of naproxen as potential prodrugs for skin penetration. 1. Synthesis and physico-chemical properties].

Several esters of the nonsteroidal antiinflammatory drug Naproxen [2-(6-methoxy-2-naphthyl)propionic acid] were synthesized by standard procedures. Melting points and enthalpies of melting were obtained by differential scanning calorimetry. Solubilities in water were measured using HPLC. The partition coefficients (octanol/water) were calculated according to Rekker and Mannhold and Rm-values were determined by RP-TLC. The two latter parameters were correlated with high significance.