ANTIVIRAL PYRIMIDINEDIONE DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF

摘要

The present invention relates to pyrimidinedione derivatives of formula (I) which are useful as an antiviral agent, especially as an agent for treatment of AIDS, pharmaceutically acceptable salts thereof and process for the preparation thereof, wherein R represents cyclopropyl, cyclobutyl, cyclohexyl, optionally substituted phenyl with C1-C4 alkyl and halogen, benzoxazolyl, pyridyl, epoxyethyl, (C1-C4 alkyl)carbonyl or phenylcarbonyl, R1, R2 and R3 represent independently C1-C4 alkyl, X represents oxygen atom, and Y represents oxygen atom, sulfur atom or carbonyl.