[EN] A NOVEL CATALYTIC PROCESS FOR THE PRODUCTION OF 3,3', 4,4'-TETRAMINOBIPHENYL<br/>[FR] NOUVEAU PROCEDE CATALYTIQUE DE PRODUCTION DE 3,3', 4,4'-TETRAMINOBIPHENYLE
申请人:COUNCIL SCIENT IND RES
公开号:WO2005092839A1
公开(公告)日:2005-10-06
This invention relates to a process for the production of 3,3’, 4,4’-tetraminobiphenyl (TAB) of formula (1) from non-carcinogenic raw materials, employing Suzuki type biaryl coupling as the key step. sMore particularly, it relates to a three steps process for the production of TAB comprising biaryl aryl coupling of 2-nitro-4-bromoacetanilide (NBA) of formula (2) catalyzed by sulfilimine based palladacycles as catalysts followed by the basic hydrolysis of acetyl group and the reduction of nitro groups with conventional reducing agents.
这项发明涉及一种从非致癌原料制备3,3',4,4'-四氨基联苯(TAB)的方法,其关键步骤是采用铃木偶联反应。更具体地说,它涉及一种三步法生产TAB的过程,包括以磺亚胺基钯环化合物为催化剂催化2-硝基-4-溴乙酰苯胺(NBA)的偶联反应,随后进行乙酰基碱性水解和用传统还原剂还原硝基基团。