公开(公告)号：US06706911B1

公开(公告)日：2004-03-16

申请号：US10319242

申请日：2002-12-13

Applicant: Norbert Lui ,  Thomas Brackemeyer ,  Peter Müller ,  Marielouise Schneider

Inventor： Norbert Lui ,  Thomas Brackemeyer ,  Peter Müller ,  Marielouise Schneider

IPC: C07C69653

CPC classification number: C07D231/14 ,  C07C227/16 ,  C07C229/30

Abstract: The present invention relates to an improved process for preparing 2-haloacyl-3-aminoacrylic acid derivatives and pyrazole-4-carboxylic acids and derivates thereof obtainable from it.

Abstract translation: 本发明涉及一种制备2-卤代酰基-3-氨基丙烯酸衍生物和吡唑-4-羧酸的改进方法及其衍生物。