Method for producing diphenyl sulfone compounds

Details Method for producing diphenyl sulfone compounds Method for producing diphenyl sulfone compounds

C - Chemistry, Metallurgy

07

C

C07C 317/22 (2006.01) C07C 315/00 (2006.01) C07C 315/04 (2006.01)

Patent

CA 2049045

ABSTRACT A method of producing diphenyl sulfone compounds of the formula (I) Image (I) wherein R is an alkyl having l to 8 carbon atoms, a cycloalkyl having 3 to 8 carbon atoms, an alkenyl having 2 to 8 carbon atoms or an arylalkyl which may have substituent(s) on the aromatic ring, comprising reacting 4,4'-dihydroxydiphenyl sulfone with a compound of the formula R - X wherein R is as defined above and X is halogen, characterized by conducting the reaction in 0.3-1.5 weight parts of an aqueous solvent per weight part of 4,4'-dihydroxydiphenyl sulfone in the presence of 1.5-3 moles of an alkali per mole of 4,4'- dihydroxydiphenyl sulfone. Since the method of the invention permit production of 4- substituted hydroxy-4'-hydroxydiphenyl sulfones, specifically 4- n-propoxy-4'-hydroxydiphenyl sulfone or 4-isopropoxy-4'- hydroxydiphenyl sulfone using an inexpensive solvent, with good selectivity and economical feasibility, they are industrially advantageous. 14

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