Patent ID: 8581009
Filing Date: 2013-11-12
Classification: C07C,G03F

Abstract:
1. A method for producing a 2-(alkylcarbonyloxy)-1,1-difluoroethanesulfonic acid onium salt represented by a formula [5] comprising the step of: carrying out an onium-salt exchange on the 2-(alkylcarbonyloxy)-1,1-difluoroethanesulfonic acid ammonium salt represented by a formula [3], by using a monovalent onium salt represented by a formula [4] wherein the 2-(alkylcarbonyloxy)-1,1-difluroethanesulfonic acid ammonium salt represented by a formula [3] is obtained by a 1st process (a sulfination process) reacting a carboxylic acid bromodifluoroethyl ester represented by a formula [1] with a sulfinating agent in the presence of an amine thereby obtaining a 2-(alkylcarbonyloxy)-1,1-difluoroethanesulfinic acid ammonium salt represented by a formula [2] and a 2nd process (an oxidation process) reacting the 2-(alkylcarbonyloxy)-1,1-difluoroethanesulfinic acid ammonium salt represented by the formula [2] and obtained by the 1st process (the sulfination process) with an oxidizing agent thereby obtaining a 2-(alkylcarbonyloxy)-1,1-difluoroethanesulfonic acid ammonium salt represented by the formula [3], wherein R represents a linear or branched alkyl group having 1 to 10 carbon atoms, an alicyclic organic group having 3 to 20 carbon atoms, an organic group having 3 to 20 carbon atoms and containing an alicyclic organic group and a linear alkylene group, a monocyclic or polycyclic lactone having 3 to 30 carbon atoms, or an aryl group having 6 to 20 carbon atoms, wherein some or all of hydrogen atoms in each of the alkyl group, the alicyclic organic group, the organic group containing the alicyclic organic group and the linear alkylene group, the monocyclic or polycyclic lactone and the aryl group may be substituted with fluorine, a hydroxyl group, a hydroxycarbonyl group, or a linear, branched or cyclic alkoxy group having 1 to 6 carbon atoms, wherein two hydrogen atoms on the same carbon that constructs the alkyl group, the alicyclic organic group, or the organic group containing the alicyclic organic group and the linear alkylene group may be substituted with one oxygen atom to fonn a keto group, wherein those who have in its R structure an unconjugated unsaturated moiety (a double or triple bond) are excepted, and wherein A wherein X wherein Q wherein R wherein any two or more of R wherein R wherein m represents an integer of between 1 and 5, wherein n represents 0 or 1, and wherein q represents an integer of between 0 and 5.