申请人:Kissei Pharmaceutical Co., Ltd.
公开号:US08022192B2
公开(公告)日:2011-09-20
The present invention relates to a method for preparing the glucopyranosyloxypyrazole derivatives which are useful as agents for the prevention or treatment of a disease associated with hyperglycemia such as diabetes, diabetic complications, obesity or the like. A glucopyranosyloxypyrazole derivative can be easily and efficiently prepared by allowing a benzylpyrazole derivative represented by the general formula:
wherein R1, R2, R3, R4 and R5 may be the same or different, for example each of them is a hydrogen atom, a halogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, R6 is an alkyl group, for example R7 is a hydrogen atom or an alkyl, alkoxy, arylmethyloxy group or the like, to react with a compound represented by the general formula:
wherein as an example, PG1 is a pivaloyl group or the like, as an example, X1 is a bromine atom or the like, therefore the present invention is extremely useful as a method for preparing pharmaceutical compounds.
本发明涉及一种制备葡萄糖吡唑基氧代吡唑衍生物的方法,该衍生物可用作预防或治疗与高血糖相关的疾病,如糖尿病、糖尿病并发症、肥胖症等的药物。通过让一种由下式表示的苄基吡唑衍生物与下式表示的化合物反应,可以轻松高效地制备葡萄糖吡唑基氧代吡唑衍生物:其中R1、R2、R3、R4和R5可能相同或不同,例如它们中的每一个是氢原子、卤素原子或烷基、烷氧基、芳基甲氧基基团等,R6是烷基,例如R7是氢原子或烷基、烷氧基、芳基甲氧基基团等。例如,PG1是肉桂酰基等,X1是溴原子等。因此,本发明作为一种制备药物化合物的方法极为有用。