申请人:Université de Liège
公开号:EP3296292A1
公开(公告)日:2018-03-21
The invention provides a method for the preparation of an intermediate for use in synthesizing a lower alkyl phenidate compound of formula (I):
wherein each R1 independently represents an optionally substituted aryl, heteroaryl, alkyl, cycloalkyl, alkoxy, aryloxy, acyl, carboxyl, hydroxyl, halogen, amino, nitro, sulfo or sulfhydryl group, R2 represents a hydrogen atom or a lower alkyl group, n represents an integer from 1 to 5 and m represents an integer from 1 to 3 or a pharmaceutically acceptable salt thereof;
which method comprises the steps of:
(a) flowing a tosylhydrazone compound of formula (IV):
wherein R1, n and m are as defined above in relation to the methylphenidate of formula (I), an organic base and an organic solvent into a fluidic network; and
(b) reacting the tosylhydrazone compound of formula (IV) and the base in the fluidic network under thermal and/or photochemical conditions to form a transient diazoamide compound of formula (V):
wherein R1, n and m are as defined above in relation to the methylphenidate of formula (I).
本发明提供了一种用于合成式(I)的低级烷基苯甲酸酯化合物的中间体的制备方法:
其中每个 R1 独立地代表任选取代的芳基、杂芳基、烷基、环烷基、烷氧基、芳氧基、酰基、羧基、羟基、卤素、氨基、硝基、磺基或巯基,R2 代表氢原子或低级烷基,n 代表 1 至 5 的整数,m 代表 1 至 3 的整数或其药学上可接受的盐;
该方法包括以下步骤
(a) 流动式(IV)的甲苯磺酰腙化合物:
式(IV)的甲苯磺酰腙化合物,其中 R1、n 和 m 如上文关于式(I)的哌醋甲酯、有机碱和有机溶剂所定义;以及
(b) 在热和/或光化学条件下,使式(IV)的甲苯腙化合物和流体网络中的碱反应,形成式(V)的瞬时重氮酰胺化合物:
其中 R1、n 和 m 如上文关于式 (I) 哌醋甲酯的定义。