申请人:TAKEDA CHEMICAL INDUSTRIES, LTD.
公开号:EP0839801A3
公开(公告)日:1998-11-11
A method for producing a compound of the formula:
wherein R is an acyl group or a silyl group, the rings A and B respectively may have one to four substituent(s), or a salt thereof, which comprists reacting a compound of the formula:
wherein R has the same meaning as defined above, the ring A may have one to four substituents at the position(s) other than 2-position, or a salt thereof, with a compound of the formula:
wherein Y is a hydroxyl group or a halogen atom, the ring B may have one to four substituent(s), or its salt, in the presence of a catalyst other than polyphosphonic acid.The method produces aminobenzophenone derivative of the formula (I) in a high purity, a high yield, with a conventional and commercially advantageous procedure.
一种用于制备以下化合物的方法:
其中R是酰基或硅基,环A和环B分别可以有一到四个取代基,或其盐,所述方法包括将以下化合物反应:
其中R具有上述定义的相同含义,环A可以在2-位置以外的位置具有一到四个取代基,或其盐,与以下化合物反应:
其中Y是羟基或卤素原子,环B可以有一到四个取代基,或其盐,在除多磷酸酸以外的催化剂存在下。该方法以传统和商业上有利的程序高纯度、高产率地产生式(I)的氨基苯并苯酮衍生物。