Patent ID: 6348594
Filing Date: 2002-02-19
Classification: C07D,D06M

Abstract:
A process for preparing compounds of the formula 1 in which each of R1-R7 represents a hydrogen atom or a linear or a branched C1-C4-alkyl group, wherein R1-R7 may be identical or different, and R8 represents a linear or branched C1-C6-alkyl group, comprising reacting a compound of the formula 2 in which R9 is selected from the group consisting of â€”CHO, â€”CH(OH)â€”OR8, and â€”CH(OH)2 and R8 is defined as above, with a urea derivative of the formula 3 in which R1-R6 are defined as above, and the reaction product obtained is optionally reacted with an alcohol of the general formula Xâ€”OH, in which X represents a linear or branched C1-C4-alkyl group, wherein the compound of the formula 2 is reacted with the urea derivative of the formula 3 at a temperature of 25-100Â° C.