申请人:Takeda Chemical Industries, Ltd.
公开号:EP1445254A1
公开(公告)日:2004-08-11
As a method capable of conveniently producing a pyrazole compound in a high yield, which is useful as a synthetic intermediate for a pharmaceutical agent such as a therapeutic agent for diabetes and the like, a production method of a compound represented by the formula (I)
wherein n is an integer of 1 to 4 and R1 is a hydrocarbon group optionally having substituents, or a salt thereof, is provided, which includes reacting a compound represented by the formula (II)
wherein Q is a hydroxy group optionally having substituents or an amino group optionally having substituents, R is a hydrocarbon group optionally having substituents and other symbols are as defined above, or a salt thereof, with hydrazine or a salt thereof.
提供一种制备嘧唑烷化合物的方法,该方法能够方便地高产得到嘧唑烷化合物,该化合物可用作制药中间体,例如治疗糖尿病等治疗剂的合成中间体。该制备方法包括将式(II)所表示的化合物与肼或其盐反应,其中n为1至4的整数,R1为具有取代基的烃基或其盐。式(II)中Q为具有取代基的羟基或氨基,R为具有取代基的烃基,其他符号如上所定义。