The present invention relates to a novel process for the preparation of a pyrazole carboxylic acid derivative of the formula
wherein R
1
is C
1-7
-alkyl and R
3
is C
1-7
-alkyl which is optionally substituted with halogen or C
1-4
-alkoxy.
The pyrazole carboxylic acid derivative of the formula I can be used as building block in the preparation of pharmaceutically active principles e.g. for compounds acting as phosphodiesterase (PDE) inhibitors, particularly PDE10 inhibitors. PDE10 inhibitors have the potential to treat psychotic disorders like schizophrenia.
本发明涉及一种新型制备
吡唑羧酸衍
生物的方法,其
化学式如下:其中R1为C1-7烷基,R3为C1-7烷基,可选地被卤素或C1-4烷氧基取代。化合物I的
吡唑羧酸衍
生物可用作制备药用活性原理的构建块,例如用于作为
磷酸二酯酶(PDE)
抑制剂的化合物,特别是PDE10
抑制剂。PDE10
抑制剂具有治疗精神分裂症等精神障碍的潜力。