申请人:UBE INDUSTRIES LIMITED
公开号:EP1000937A1
公开(公告)日:2000-05-17
The present invention relates to a process for producing 4-alkoxycarbonyl-2-oxazolidinone compound represented by the formula (III):
wherein R1 represents H, an alkyl group, an cycloalkyl group, an alkenyl group or a phenyl group, R2 represents H, an alkyl group, a phenyl group or an alkenyl group, R3 represents an alkyl group, a cycloalkyl group, an alkenyl group, or a phenyl group, and R4 represents H, an alkyl group, an alkenyl group, a cycloalkyl group, an alkynyl group, an aryl group, a 5- or 6-membered heteroaromatic ring group, an alkoxycarbonyl group, an acetyl group or a benzoyl group,
which comprises reacting a 5-alkoxy-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):
R4CHO (II)
wherein R4 has the same meaning as defined above, in the presence of a Lewis acid catalyst.
本发明涉及一种生产由式(III)代表的 4-烷氧基羰基-2-噁唑烷酮化合物的工艺:
其中 R1 代表 H、烷基、环烷基、烯基或苯基,R2 代表 H、烷基、苯基或烯基,R3 代表烷基、环烷基、烯基或苯基,R4 代表 H、烷基、烯基、环烷基、炔基、芳基、5 或 6 元杂芳环基团、烷氧基羰基、乙酰基或苯甲酰基、
其中包括使式 (I) 所代表的 5-烷氧基-2(3H)恶唑酮化合物发生反应:
其中 R1、R2 和 R3 的含义与上述定义相同、
和式 (II) 所代表的醛化合物:
R4CHO (II)
其中 R4 的含义与上文所定义的相同,在路易斯酸催化剂存在下。