C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/262, 260/277
C07D 233/64 (2006.01) C07D 233/76 (2006.01) C08G 18/83 (2006.01) C08G 73/06 (2006.01)
Patent
CA 1072101
ABSTRACT OF THE DISCLOSURE This invention relates to a process for the preparation of a compound of general formula Image (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 or substituted with nitro, halogen, alkyl, alkoxy, haloalkyl and/or hydroxyl; an aralkyl group or a heterocyclic group as defined above, X represents oxygen or sulphur and n represents an integer from one to 30 by reaction with a urea with a corresponding 1,2-ethylene-dicar- boxylic acid ester which is either unsubstituted or alkyl substituted in a single stage reaction.
260545
Merten Rudolf
Rottmaier Ludwig
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