申请人:Namekata Takeshi
公开号:US20090069602A1
公开(公告)日:2009-03-12
A process for producing 2,2′-bis (trifluoromethyl)-4,4′-diaminobiphenyl which is useful as a raw material for polyimide resin, etc.
In benzidine rearrangement of 3,3′-bis(trifluoromethyl) hydrazobenzene in the presence of an inorganic acid such as sulfuric acid aqueous solution or concentrated hydrochloric acid, use of a water-immiscible organic solvent such as toluene as reaction solvent can increase the yield of the product.
3,3′-bis(trifluoromethyl) hydrazobenzene can be synthesized by reduction of m-nitrobenzotrifluoride.
一种生产2,2'-双(三氟甲基)-4,4'-二氨基联苯的方法,该物质可用作聚酰亚胺树脂等原材料。在存在无机酸(如硫酸水溶液或浓盐酸)的条件下,通过苯二酚重排反应3,3'-双(三氟甲基)肼苯,使用水不相溶的有机溶剂(如甲苯)作为反应溶剂可以提高产物的产率。3,3'-双(三氟甲基)肼苯可以通过对硝基苯三氟甲基的还原来合成。