1-AMINO-5-HALOGENOURACILS, PROCESS FOR THEIR PREPARATION, AND CENTRAL NERVOUS SYSTEM DEPRESSANTS CONTAINING SAME AS ACTIVE INGREDIENT

摘要

The invention relates to central nervous system depressants containing a 1-amino-5-halogenouracil represented by formula (I) (wherein X represents a halogen atom) or its salt as an active ingredient; 1-amino-5-halogenouracils represented by formula (II) (wherein X' represents chlorine, iodine or bromine) or salts thereof; and a process for preparing a 1-amino-5-halogenouracil represented by the above formula (I) from a pyramidine derivative represented by formula (III) (wherein X represents a halogen atom, and R represents a protective group).