申请人:Takeda Chemical Industries, Ltd.
公开号:EP1266898A1
公开(公告)日:2002-12-18
The present invention provides a process for producing an intermediate for thienopyrimidine derivatives having the GnRH antagonistic activity at an industrial large scale.
The process for production of the present invention relates to a process for producing a compound represented by the formula (III):
wherein respective symbols have the same meanings as those described below, or a salt thereof, which comprises subjecting a compound represented by the formula (I) :
wherein R1 denotes hydrogen, nitro, halogen, phthalimido, mono- or di-(alkylcarbonyl)amino or alkoxy, or a salt thereof, to an acid halogenating reaction, which is successively reacted with malonic acid ester and magnesium alkoxide, treated with an acid, and reacted with sulfur and a compound represented by the formula: NCCH2COOR2 [wherein R2 denotes alkyl or aryl], or a salt thereof, in the presence of primary amine. According to the process of production of the present invention, thienopyrimidine derivatives having the GnRH antagonistic activity can be produced effectively and at an industrial large scale by a high yield and simple method.
本发明提供了一种大规模工业化生产具有 GnRH 拮抗活性的噻吩嘧啶衍生物中间体的工艺。
本发明的生产工艺涉及一种由式(III)代表的化合物的生产工艺:
式(I)代表的化合物或其盐的工艺,该工艺包括将式(I):
其中 R1 表示氢、硝基、卤素、邻苯二甲酰亚胺、单-或二-(烷基羰基)氨基或 烷氧基,或其盐,进行酸卤化反应,该反应先后与丙二酸酯和烷氧化镁反应,用酸 处理,并与硫和由式表示的化合物反应:NCCH2COOR2[其中 R2 表示烷基或芳基]的化合物或其盐在伯胺存在下进行反应。根据本发明的生产工艺,具有 GnRH 拮抗活性的噻吩嘧啶衍生物可以通过高产率和简单的方法有效地大规模工业化生产。