The present invention provides a process for the preparation of substituted 3′-hydrazino-biphenyl-3-carboxylic acid compounds. The present invention further provides a process for the preparation of 3′-N′-[1-(3,4-dimethylphenyl)-3-methyl-5-oxo -1,5-dihydro-pyrazol-4-ylidene]hydrazino}-2′-hydroxybiphenyl-3-carboxylic acid, its intermediate compounds and pharmaceutically acceptable salts thereof.
本发明提供了一种制备取代的3'-
肼基
联苯-3-
羧酸化合物的方法。本发明还提供了一种制备3'-N'-[1-(3,4-二甲基苯基)-3-甲基-5-氧代-1,5-二氢-
吡唑-4-基]
肼基}-2'-羟基
联苯-3-
羧酸及其中间体化合物和药学上可接受的盐的方法。