38980-69-7Relevant academic research and scientific papers
NEW CYCLOADDUCT PRECURSORS OF DIHALODIPHENYLSULFONES AND PREPARATIONS THEREOF
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Page/Page column 17, (2019/02/25)
The invention relates to new compounds of formula (I) wherein X represents a halogen atom selected from the group consisting of fluorine, chlorine, bromine and iodine, which are useful for the preparation of 4,4'dihalodiphenylsulfones of formula (III) wherein X is as defined above.
IMPROVED PROCESS FOR MAKING DIARYL SULFONES
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Page/Page column 25, (2016/12/26)
A process for preparing diaryl sulfones, such as 4,4'-dichlorodiphenylsulfone is disclosed. The process comprises contacting an aryl compound with sulfur trioxide to provide a benzene sulfonic acid. The benzene sulfonic acid is coupled to additional aryl compound in the presence of a catalyst. During the coupling step, the additional aryl compound is continuously added while water is removed.
PROCESSES FOR PREPARING 4-CHLOROBENZENESULFONIC ACID AND 4,4'-DICHLORODIPHENYL SULFONE
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Page/Page column 4, (2011/10/02)
The invention relates to a process for preparing 4-chlorobenzenesulfonic acid from 2-chlorobenzenesulfonic acid and/or 3-chlorobenzenesulfonic acid, comprising the conversion of 2-chlorobenzenesulfonic acid and/or 3-chlorobenzenesulfonic acid to 4-chlorobenzenesulfonic acid in the presence of sulfuric acid at a temperature of 100 to 300° C. The present invention further relates to a process for preparing 4,4′-dichlorodiphenyl sulfone, comprising said process for preparing 4-chlorobenzenesulfonic acid.
