申请人:KYOWA HAKKO KOGYO CO., LTD.
公开号:EP1627877A1
公开(公告)日:2006-02-22
(wherein R represents lower alkyl; R1 represents a hydrogen atom, -CH2X or -OC(=O)R3; and R2 represents a hydrogen atom, nitro, halogen, substituted or unsubstituted lower alkyl, substituted or unsubstituted lower alkoxy, substituted or unsubstituted lower alkylthio or substituted or unsubstituted aryl)
The present invention provides a simple industrial process for producing pyrazoloacridone derivatives having an antitumor activity, 1-(2-carboxyphenyl)indazole derivatives, which are useful as synthetic intermediates thereof, or the like; and the like.
For example, the present invention provides a process for producing a 1-(2-carboxyphenyl)indazole derivative represented by general formula (IV) which comprises steps of reacting a compound represented by above general formula (I) with a compound represented by above general formula (II) in the presence of a base to produce a compound represented by above general formula (III); and hydrolyzing a cyano group of the resulting compound represented by general formula (III).
(其中R代表低级烷基;R1代表氢原子、-CH2X或-OC(=O)R3;R2代表氢原子、硝基、卤素、取代或未取代的低级烷基、取代或未取代的低级烷氧基、取代或未取代的低级烷硫基或取代或未取代的芳基)
本发明提供了一种生产具有抗肿瘤活性的吡唑吖啶酮衍生物、1-(2-羧基苯基)吲唑衍生物(可用作其合成中间体)或类似物的简单工业工艺。
例如,本发明提供了一种生产通式(IV)代表的 1-(2-羧基苯基)吲唑衍生物的工艺,该工艺包括以下步骤:在碱存在下,使上述通式(I)代表的化合物与上述通式(II)代表的化合物反应,生成上述通式(III)代表的化合物;水解所得通式(III)代表的化合物的氰基。