申请人:Mitsui Toatsu Chemicals, Inc.
公开号:US04769463A1
公开(公告)日:1988-09-06
Noval diamines, 2,6-bis(3-aminophenoxy)pyridine and 2,6-bis-(4-aminophenoxy)pyridine, are provided and the method of their preparation is disclosed. These diamines are useful as raw materials for polyimide. These diamines can be prepared by the reaction of 2,6-dichloropyridine or 2,6-dibromopyridine with 3-aminophenol or 4-aminophenol in aprotic polar solvents in the presence of bases. Besides, 2,6-bis(3-aminophenoxy)pyridine can also be prepared by the reaction of 2,6-dicholorpyridine or 2,6-dibromopyridine with 3-nitrophenol, followed by reducing resultant 2,6-bis(3-nitrophenoxy)pyridine.
提供了Noval二胺,2,6-双(3-氨基苯氧基)吡啶和2,6-双(4-氨基苯氧基)吡啶,并公开了它们的制备方法。这些二胺可用作聚酰亚胺的原料。这些二胺可通过在无水极性溶剂中,与碱存在的条件下,使2,6-二氯吡啶或2,6-二溴吡啶与3-氨基苯酚或4-氨基苯酚反应来制备。此外,2,6-双(3-氨基苯氧基)吡啶还可通过2,6-二氯吡啶或2,6-二溴吡啶与3-硝基苯酚反应,然后还原得到的2,6-双(3-硝基苯氧基)吡啶来制备。