17558-86-0Relevant academic research and scientific papers
METHOD FOR PREPARATION OF 4,4'-DINITRODIPHENYLAMINE AND 4,4'-BIS(ALKYLAMINO)DIPHENYLAMINE WITH THE BASE CATALYST COMPLEX
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Page/Page column 5, (2012/06/30)
Provided is a method for preparing 4,4′-dinitrodiphenylamine (4,4′-DNDPA) in high yield via the NASH reaction using a mixture of a bis-quaternary ammonium base and a base catalyst for the reaction of urea with nitrobenzene, 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 in the presence of hydrogen and hydrogenation catalyst. The catalyst complex used in the present invention allows easy recovery, provides superior alkaline stability and is capable of reducing production cost.
PRODUCTION METHOD FOR 4,4'-BIS(ALKYLAMINO) DIPHENYLAMINE
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Page/Page column 4, (2012/08/08)
The present invention relates to a production method for 4,4′-bis(alkylamino)diphenylamine, and more specifically relates to a method in which 4,4′-dinitrodiphenylamine (4,4′-DNDPA) is produced by reacting urea with nitrobenzene in the presence of a polar organic solvent and a base catalyst, and then the 4,4′-bis(alkylamino)diphenylamine (4,4′-BAADA) is produced by subjecting the 4,4′-DNDPA and a ketone to hydrogenation in the presence of a hydrogenation catalyst.
