METHOD FOR PREPARATION OF 4,4'-DINITRODIPHENYLAMINE AND 4,4'-BIS(ALKYLAMINO)DIPHENYLAMINE BY USING 4-NITROANILINE
申请人:Kim Jin-Eok
公开号:US20120157714A1
公开(公告)日:2012-06-21
Provided is a method of preparing 4,4′-dinitrodiphenylamine (4,4′-DNDPA) in high yield by reacting 4-nitroaniline with excess nitrobenzene via the NASH reaction, and a method of preparing 4,4′-bis(alkylamino)diphenylamine (4,4′BAADA) in high yield and purity by hydrogenating the resulting 4,4′-DNDPA with a ketone compound in the presence of hydrogen and hydrogenation catalyst. The disclosed process is simple, allows selective preparation of 4,4′-DNDPA without byproducts, and thus allows preparation of 4,4′-BAADA in high yield without a complicated purification procedure.
提供了一种通过NASH反应,将4-硝基苯胺与过量的硝基苯反应,高产率制备4,4′-二硝基二苯胺(4,4′-DNDPA)的方法,以及一种通过在氢气和加氢催化剂存在下,用酮化合物对所得的4,4′-DNDPA进行氢化制备高产率和高纯度的4,4′-双(烷基氨基)二苯胺(4,4′BAADA)的方法。所披露的工艺简单,允许选择性制备4,4′-DNDPA而无副产物,从而无需复杂的纯化程序即可高产率制备4,4′-BAADA。