METHOD FOR PRODUCING CYCLIC KETONE

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PROBLEM TO BE SOLVED : To provide a method for easily producing a cyclic ketone useful as a synthetic intermediate for pharmaceuticals, agrochemicals, a ligand for olefin polymerization catalyst and a liquid crystal material in high yield at a low cost while suppressing the generation of chemical substances causing environmental pollution. SOLUTION : A cyclic ketone expressed by a specific chemical formula is produced by reacting a carboxylic acid expressed by general formula (I) with a catalytic amount of a Lewis acid expressed by general formula (II) : MXm-Ln. In general formula (I), R1 to R4 are each a univalent group; and the ring A is a monocyclic or condensed polycyclic aromatic group or heteroaromatic group optionally containing N, O or S atom as the atom constituting the ring. In general formula (II), M is a metal ion selected from Bi, Ga, In, Hf and rare-earth elements; X is an anion selected from halogens, perfluoroalkylsulfonates, bis(perfluoroalkylsulfonyl) amides and tris(perfluoroalkylsulfonyl) methide; and L is a neutral molecule having coordinating power.