Hydantoins modified with carboxylic acid ester groups

Abstract From the Canadian patent

This invention relates to a process for the preparation of a compound of general formula, (I), in which R represents an alkyl groups Rl and R2 represent hydrogen or an alkyl group; R3 represents hydrogens an alkyl or cycloalkyl group which is unsubstituted or substituted with halogen, hydroxyl or alkoxy; an aryl group which is unsubstituted or substituted with nitro, halogen, alkyl alkoxy, haloalkyl or, hydroxyl; an aralkyl group or a heterocyclic group derived from furan, pyridine, thiophene, imidasole, pyrimidine or piperazine R4 represents hydrogen; an alkyl or cycloalkyl group which are unsubstituted or substituted with halogen hydroxyl or alkoxy;, an aryl group which is unsubstituted …