Patent ID: 6414160
Filing Date: 2002-07-02
Classification: C07D

Abstract:
A process for producing a 4-alkoxycarbonyl-2-oxazolidinone compound represented by the formula (III): wherein R1 represents a hydrogen atom, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C2 to C10 alkenyl group or a substituted or unsubstituted phenyl group, R2 represents a hydrogen atom, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted phenyl group or a C2 to C10 alkenyl group which is not substituted, R3 represents a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, an unsubstituted or, provided that a 2-alkenyl group is excluded, substituted C2 to C10 alkenyl group, or a substituted or unsubstituted phenyl group, and R4 represents a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C2 to C20 alkynyl group, a substituted or unsubstituted C6 to C20 aryl group, a substituted or unsubstituted 5- or 6-membered heteroaromatic ring group having 1 or 2 hetero atoms selected from N, O and S, a substituted or unsubstituted C1 to C6 alkoxycarbonyl group, an acetyl group or a benzoyl group, which comprises reacting a 5alkoxy-2(3H)oxazolone compound represented by the formula (I): wherein R1, R2 and R3 have the same meanings as defined above, and an aldehyde compound represented by the formula (II): R4CHOâ€ƒâ€ƒ(II) wherein R4 has the same meaning as defined above, in the presence of a Lewis acid catalyst.