IMPROVED PRODUCTION METHOD FOR ADEFOVIR DIPIVOXIL

摘要

The present invention relates to an improved method of preparing adefovir dipivoxil of Formula 1. The method of the present invention is characterized by using dimethylsulfoxide as a reaction solvent, and comprises a process of preparing adefovir dipivoxil of Formula 1 by allowing adefovir of Formula 2 to react with chloromethylpivalate at a reaction temperature of 30 to 50° C. under the presence of dimethylsulfoxide and triethylamine solvents.