申请人:KOWA CO., LTD.
公开号:US20030232992A1
公开(公告)日:2003-12-18
A process for preparing a biphenylcarboxylic acid amide derivative represented by the following formula (1):
1
wherein, R
1
, R
2
and R
3
each independently represents a hydrogen atom or a substituent, which comprises reacting, in the presence of a metal catalyst, a halogenobenzoic acid derivative represented by the following formula (2):
2
wherein, X represents a halogen atom with a compound represented by the following formula (3):
3
wherein, R
1
, R
2
and R
3
have the same meanings as described above, and Y represents an leaving group having an element selected from the group consisting of boron, silicon, zinc, tin and magnesium; or salt thereof.
According to the present invention, biphenylcarboxylic acid amide derivatives of the formula (1) or salts thereof having excellent inhibitory activity against IgE antibody production can be prepared by the reduced number of steps, conveniently, at lower cost and in a high yield.
通过在金属催化剂存在下,将以下式(2)所代表的卤代苯甲酸衍生物:
2
其中,X代表与以下式(3)所代表的化合物:
3
其中,R
1
,R
2
和R
3
具有如上所述的相同含义,Y代表从硼、硅、锌、锡和镁组成的元素中选择的离去基团;或其盐,与以下式(1)所代表的联苯甲酸酰胺衍生物进行反应,其中,R
1
,R
2
和R
3
各自独立地代表氢原子或取代基团的过程,其中,根据本发明,可以通过减少步骤数量、方便地、以较低成本和高产率制备具有出色的抗IgE抗体产生抑制活性的联苯甲酸酰胺衍生物的公式(1)或其盐。