申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0321256A2
公开(公告)日:1989-06-21
A process is provided for the preparation of an N-substituted unsaturated carboxylic acid amide represented by the following formula:
wherein R¹ means a hydrogen atom or methyl group, Y denotes a methylene group, oxygen atom or methylimino group, m and n stand individually for an integer of 0-5, and m + n is an integer of 3-5. The process comprises reacting a specified β-alkoxy-substituted carboxylate with a specified cyclic amine to form a β-alkoxy-substituted carboxylic acid amide compound and then removing an alcohol from the carboxylic acid amide compound in the presence of a basic catalyst to form an unsaturated group.
本发明提供了一种制备下式所代表的 N-取代不饱和羧酸酰胺的工艺:
其中 R¹ 表示氢原子或甲基,Y 表示亚甲基、氧原子或甲基亚氨基,m 和 n 分别表示 0-5 的整数,m+n 为 3-5 的整数。该工艺包括使指定的β-烷氧基取代的羧酸酯与指定的环胺反应生成β-烷氧基取代的羧酸酰胺化合物,然后在碱性催化剂存在下从羧酸酰胺化合物中除去醇以形成不饱和基团。