Method for producing diphenylsulfone compound
AssigneeKonishi Chemical Ind. Co., Ltd.
InventorNorihito Iida
Life of this patent
Estimating the term…
Abstract
A diphenylsulfone compound containing 4,4′-dihydroxydiphenylsulfone is produced in good yield in a short time and at a relatively low temperature. A diphenylsulfone compound represented by formula (2) below is produced by irradiating, with microwaves, a compound represented by formula (1) below and a sulfonating agent so that a dehydration condensation reaction is carried out.
Claims6
A method for producing a diphenylsulfone compound, comprising carrying out a dehydration condensation reaction while removing water generated from the dehydration condensation reaction by irradiating, with microwaves, a compound represented by formula (1) below and a sulfonating agent, to produce a diphenylsulfone compound represented by formula (2) below,
- where:
- each R independently represents a hydrogen atom, or an alkyl group having 1 to 5 carbon atoms;
- and m represents an integer of 0 to 4,
- where:
- each R independently represents a hydrogen atom, or an alkyl group having 1 to 5 carbon atoms;
- and m represents an integer of 0 to 4;
- wherein the dehydration condensation reaction is carried out in the presence of a solvent which is not reactive with the compound represented by formula 1, the sulfonating agent, and the diphenylsulfone compound represented by formula 2;
- and
- wherein the temperature of the reaction system in the dehydration condensation reaction is not lower than 115° C. and not higher than 174° C.
Dependencies are inferred from the claim text.