| abstract |
A process for producing 4-alkoxycarbonyl-2-oxazolidinone compounds of general formula (III) (wherein R1 is H, alkyl, cycloalkyl, alkenyl or phenyl; R2 is H, alkyl, phenyl or alkenyl; R3 is alkyl, cycloalkyl, alkenyl or phenyl; and R4 is H, alkyl, alkenyl, cycloalkyl, alkynyl, aryl, 5- or 6-membered heteroaryl, alkoxycarbonyl, acetyl or benzoy1), characterized by reacting a 5-alkoxy-2(3H)-oxazolone compound of general formula (I) (wherein R?1, R2 and R3¿ are each as defined above) with an aldehyde compound of the general formula (II): R4CHO (wherein R4 is as defined above) in the presence of a Lewis acid catalyst. |