申请人:Yasuda Hiroshi
公开号:US20090149676A1
公开(公告)日:2009-06-11
An object of the present invention is to provide an efficient method of manufacturing 3,3′,4,4′-tetraaminobiphenyl with a smaller number of steps. The manufacturing method of 3,3′,4,4′-tetraaminobiphenyl includes reacting the amino groups of a 4-halo-o-phenylenediamine with an inorganic sulfur compound to lead to a 5-halo-2,1,3-benzothiadiazole, subsequently coupling two molecules of the benzothiadiazole together to form a 5,5′-bis(2,1,3-benzothiadiazole) and then deprotecting the amino groups to yield 3,3′,4,4′-tetraaminobiphenyl.
本发明的目的是提供一种更少步骤的高效制备3,3′,4,4′-四氨基联苯的方法。该制备方法包括将4-卤基-o-苯二胺的氨基基团与无机硫化合物反应,形成5-卤基-2,1,3-苯并噻二唑,随后将两个苯并噻二唑分子耦合在一起形成5,5′-双(2,1,3-苯并噻二唑),然后去保护氨基基团以得到3,3′,4,4′-四氨基联苯。