105112-83-2Relevant academic research and scientific papers
Synthetic method 4,4 ' -bis (3 -aminophenoxy) diphenyl sulfone
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Paragraph 0023-0024; 0028-0029, (2021/10/30)
The invention discloses a synthetic method of 4,4 '- bis (3 -aminophenoxy) diphenyl sulphone, which comprises 1, 3 -dinitrobenzene and 4,4 -dihydroxydiphenyl sulfone through nucleophilic substitution reaction in the presence of an alkaline catalyst to generate 4,4' - bis (3 - 3 - '-nitrophenoxy) diphenyl sulfone through catalytic hydrogenation reaction to form bis 3 - (and 4,4-aminophenoxy) diphenyl sulphone. 4,4' . The raw material 1,3 - dinitrobenzene adopted by the synthetic method is only one third of the price of the meta-aminophenol, so that the production cost is greatly reduced. In addition, the reaction temperature is 110 - 120 °C, and compared with the prior art, the reaction temperature is mild and the energy consumption is lower. The synthesis method disclosed by the invention not only is high in reaction yield, but also can obtain higher product purity by adopting n-heptane for recrystallization, the product color is white, the content of metal ions is low, and the synthesis method is suitable for industrial production.
Preparation of bis(3-nitrophenoxy) compound
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, (2008/06/13)
A preparation process of a bis(3-nitrophenoxy) compound represented by the formula: STR1 wherein X is a direct bond, divalent hydrocarbon having from 1 to 10 carbon atoms or a divalent group selected from --C(CF3)2, --CO--, --S--, --SO--, SO2 --or --O--, which comprises reacting 4,4'-bisphenol with m-dinitrobenzene in the presence of an alkali metal carbonate or alkali metal hydrogen carbonate having a particle size of 250 μm or less while removing generated water from the reaction system during the reaction. In one embodiment of the process, the reaction is carried out while simultaneously adding 4,4'-bisphenol and m-dinitrobenzene to a reaction vessel which was previously charged with the base and an aprotic polar solvent.
Bis(3-aminophenoxy) aromatics and method of preparing the same
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, (2008/06/13)
Bis(3-nitrophenoxy) derivatives of aromatic or bridged aromatic hydrocarbons are derived from m-dinitrobenzene and dihydroxy derivatives of said hydrocarbons and certain substituted derivatives thereof by a condensation reaction in dipolar aprotic solvents in the presence of bases. The bis(3-nitrophenoxy) derivatives and derivatives obtained are successively reduced to afford bis-(3-aminophenoxy)derivatives. This is a new method for reacting the dihydroxy-derivatives with m-dinitrobenzene, and hence can prepare novel bis(3-aminophenoxy) derivatives such as 4,4'-bis(3-amino-phenoxy)biphenyl, 1-[4-(3-aminophenoxy)phenyl]-1,3,3-trimethyl-6-(3-aminophenoxy)indan, 6,6'-bis(3-aminophenoxy)3,3,3',3'-tetramethyl-1,1'spirobiindan, and methyl substituted 2,2'-bis[4-(3-aminophenoxy)phenyl]propane.
