7545-50-8Relevant articles and documents
Preparation method for 3,3'-diamino-4,4'-dihydroxy diphenyl sulfone
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Paragraph 0028; 0029, (2016/10/08)
The invention relates to a preparation method for 3,3'-diamino-4,4'-dihydroxy diphenyl sulfone. The preparation method comprises the following steps: dissolving 3,3'-dinitro-4,4'-dichloro diphenyl sulfone in a polar solvent, dimethyl sulfoxide, adding a sodium hydroxide solution and reacting completely, then regulating pH to 1-2 and precipitating a solid to obtain 3,3'-dinitro-4,4'-dihydroxy diphenyl sulfone; and dissolving the 3,3'-dinitro-4,4'-dihydroxy diphenyl sulfone in a polar solvent, dimethyl sulfoxide, adding an ammonium chloride aqueous solution and reduced iron powders, carrying out thermal filtering after raw materials are reacted completely, washing filter cakes with hot dimethyl sulfoxide, combining filtrate, distilling under reduced pressure to obtain a mixed solution of the dimethyl sulfoxide and water, and drying to obtain the 3,3'-diamino-4,4'-dihydroxy diphenyl sulfone. The method has the advantages of high yield, easiness in operation, good repeatability and the like. Meanwhile, raw materials are easy to purchase, requirements on production equipment are low, and solvents can be reused.
The synthesis of diarylsulfones with simple arenes and K2S2O8 through double C-S bond formation
Yang, Yiqing,Chen, Zhang,Rao, Yu
supporting information, p. 15037 - 15040 (2014/12/11)
An unprecedented double C-S bond formation method has been developed to prepare both symmetric and unsymmetric diarylsulfones with simple arenes in a single step. This represents the first example that K2S2O8 can be employed as a highly effective sulfonating agent to synthesize diarylsulfones. The reaction demonstrates excellent reactivity, good functional group tolerance and high yields.