申请人:Zhejiang Jiuzhou Pharmaceutical Co., Ltd.
公开号:EP2551259A1
公开(公告)日:2013-01-30
The invention relates to Sitagliptin intermediate compounds of formula (f), preparation methods and uses thereof. The compound of formula (f) are prepared by the following steps: compounds of formula (a) are subjected to electrophilic reaction with benzyl halides to form compounds of formula (b), which then react with compounds of formula (i) to form novel compounds of formula (e); Gignard agents formed from 2,4,5-trifluoro bromobenzene and magnesium metal react with compounds of formula (e) to afford compounds of formula (f), which are novel intermediate compounds for the preparation of Sitagliptin intermediates of formula (g). The compound of formula (f) was subjected to reduction by Pd/C, debenzylation, substitution of protecting group to form the compounds of formula (g). The mentioned compounds have the following structures, wherein, R is the protecting group of carboxyl, R2 is (substituted) hydrocarbyl.
本发明涉及式(f)的西他列汀中间体化合物、制备方法及其用途。式(f)化合物通过以下步骤制备:式(a)化合物与苄基卤化物发生亲电反应生成式(b)化合物,然后与式(i)化合物反应生成新型式(e)化合物;由2,4,5-三氟溴苯和金属镁生成的吉格纳剂与式(e)化合物反应生成式(f)化合物,该化合物是制备式(g)西他列汀中间体的新型中间体化合物。式 (f) 化合物经 Pd/C 还原、去苄基化、保护基取代后形成式 (g) 化合物。上述化合物具有以下结构,其中,R 为羧基保护基,R2 为(取代的)烃基。