27173-16-6Relevant academic research and scientific papers
Preparation method of diaryl p-phenylenediamine anti-aging agent
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Paragraph 0081-0084, (2020/02/10)
The invention provides a preparation method of a diaryl p-phenylenediamine anti-aging agent represented by a formula I, wherein the method comprises: carrying out a condensation dehydrogenation reaction on p-nitroaniline and a raw material B represented by a formula II in the presence of a solvent, a water-carrying agent and a catalyst, wherein R1 and R2 are respectively and independently H or C1-C6 alkyl, and R is H or C1-C6 alkyl.
Preparation method for aryl substituted p-phenylenediamine substance
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Paragraph 0049; 0050, (2017/06/02)
The invention provides a preparation method for an aryl substituted p-phenylenediamine substance. The aryl substituted p-phenylenediamine substance has the following structural formula defined in the specification, wherein R'' is phenyl or o-methyl phenyl, and R' and R'' are the same or different. The preparation method comprises the steps of carrying out a reaction of a raw material A and a raw materials B under the action of a hydrogen acceptor and a catalyst, to form the aryl substituted p-phenylenediamine substance, wherein the raw material A has the structural formula defined in the specification, the raw material B is cyclohexanone and/or o-methylcyclohexanone, and the hydrogen acceptor is a hydrogen acceptor which can accept hydrogen to be converted into the raw material B. The preparation method provided by invention has the advantages that the raw materials are cheap and easy to obtain, and reaction post-processing has no need of use of a lot of water. At the same time, the reaction conditions are mild, and equipment cannot be corroded. Therefore, the preparation method has the advantages of environmental protection and less pollution and can obtain better economic benefits.
