Method for the production of N-(5-amino-2-cyano-4-fluoro-phenyl)-sulphonamides and new intermediate products
申请人:Bayer Aktiengesellschaft
公开号:US06310206B1
公开(公告)日:2001-10-30
The invention relates to a process for preparing N-(5-amino-2-cyano-4-fluoro-phenyl)-sulphonamides in which, in a first step, 2-amino-4,5-difluoro-benzonitrile is reacted with sulphonyl halides in the presence of an acid acceptor and in the presence of a diluent at temperatures between 0° C. and 150° C. and, in a second step, the N-(2-cyano-4,5-difluoro-phenyl)-sulphon-amides and/or N-(2-cyano-4,5-difluoro-phenyl)-sulphonamides obtained in the first step are as pure substances or as mixtures with ammonia in the presence of a diluent reacted at a temperature between 100° C. and 200° C. The invention furthermore relates to novel intermediates of the process.
该发明涉及一种制备N-(5-氨基-2-氰基-4-氟苯基)-磺酰胺的过程,其中,在第一步中,2-氨基-4,5-二氟苯甲腈在存在酸性受体和稀释剂的条件下与磺酰卤反应,在0°C至150°C的温度下进行;在第二步中,N-(2-氰基-4,5-二氟苯基)-磺酰胺和/或在第一步中获得的N-(2-氰基-4,5-二氟苯基)-磺酰胺作为纯物质或与氨的混合物在存在稀释剂的条件下在100°C至200°C的温度下反应。该发明还涉及该过程的新中间体。