Method for preparing N-alkoxycarbonylpiperidine derivative, and intermediate therefor
申请人:YUKI GOSEI KOGYO CO., LTD.
公开号:US11332458B2
公开(公告)日:2022-05-17
The object of the present invention is to provide a simple method for preparing an N-alkoxycarbonyl piperidine derivative.
The object can be solved by a method for preparing a hydroxypiperidine derivative, comprising a step of:
(A) reacting a piperidylidene acetic acid derivative represented by the formula (1):
wherein R1 is an aralkyl group which may have a substituent group, and R2 is an alkyl group, with 4-hydroxypiperidine in the presence of base, to obtain a hydroxypiperidine derivative represented by the formula (2) or the formula (3):
wherein R1 is an aralkyl group which may have a substituent group.
本发明的目的是提供一种制备 N-烷氧基羰基哌啶衍生物的简单方法。
本发明的目的可以通过制备羟基哌啶衍生物的方法来解决,该方法包括以下步骤: 1:
(A) 使式(1)代表的亚哌啶基乙酸衍生物反应:
其中 R1 为芳基,可带有取代基;R2 为烷基,在碱存在下与 4-羟基哌啶反应,得到由式(2)或式(3)表示的羟基哌啶衍生物:
其中 R1 是一个芳烷基,可带有一个取代基。