Abstract: A process for producing an optically active cyclopropanecarboxylic acid ester compound represented by the formula (4): (wherein R5, R6 and * each represents the same meaning as defined below), comprising reacting a diazoacetic acid ester represented by the formula (2): N2CHCO2R5??(2) (wherein R5 represents an alkyl group having 1 to 15 carbon atoms or the like) with a compound represented by the formula (3): (wherein R6 represents an alkyl group having 1 to 15 carbon atoms or the like), in the presence of an asymmetric copper complex obtained by reacting a copper compound and an optically active salicylideneaminoalcohol compound represented by the formula (1): (wherein R1 represents an alkyl group having 1 to 4 carbon atoms or the like, R2 represents a hydrogen atom or the like, R3 and R4 independently represent a hydrogen atom or the like, and * represents an asymmetric center).

Abstract: A process for producing comprising reacting a 3-formyl-2,2-dimethylcyclopropanecarboxylate and propionitrile in the presence of a base to obtain 3-(2-cyano-1-propenyl)-2,2-dimethylcyclopropanecarboxylic acid or its salt.

Abstract: A method comprising an oximation step of reacting a formylalkenylcyclopropanecarboxylic acid ester represented by the formula (1): (wherein, R1 represents an alkyl group optionally having substituent(s) or halogen atom(s), and R2 represents an alkyl group optionally having substituent(s) or a benzyl group optionally having substituent(s)) and hydroxylamine in a solvent in the presence at least one compound selected from the group consisting of carboxylic acids and carboxylic acid metal salts, to produce a hydroxyiminoalkenylcyclopropanecarboxylic acid ester represented by the formula (3): (wherein, R1 and R2 are as defined above).

Abstract: A method for producing a cyclopropanecarboxylic acid compound represented by formula (VI) (wherein R denotes the same as below), which comprising reacting a compound represented by formula (V) (wherein R denotes a chain hydrocarbon group having 1 to 10 carbon atoms or the like, and R1 denotes a chain hydrocarbon group having 1 to 10 carbon atoms optionally substituted with a halogen atom or the like) with an alkali metal borohydride compound in the presence of a solvent.

Abstract: A method for producing a purified formylcyclopropane compound represented by the formula (1) comprising (A) a step of reacting a crude formylcyclopropane compound represented by the formula (1): wherein R1 represents an alkyl group or the like, with an alkali metal hydrogen sulfite to obtain an alkali metal hydroxymethanesulfonate represented by the formula (2): wherein R1 represents the same meaning as defined above and M represents an alkali metal, and (B) a step of reacting an acid, a base or a water-soluble aldehyde with the alkali metal hydroxymethanesulfonate represented by the formula (2) obtained in the above-mentioned step (A) to obtain a purified formylcyclopropane compound represented by the formula (1).

Abstract: A process for producing a trichloropyrimidine compound represented by the formula (2): wherein R represents a hydrogen atom etc., comprising reacting a dihydroxypyrimidine compound represented by the formula (1): wherein R represents the same meaning as above, with sulfuryl chloride and at least one chlorinating agent selected from the group consisting of hydrogen chloride, thionyl chloride, phosgene, phosphorus oxychloride, phosphorus pentachloride and phosphorus trichloride in the presence of an organic base.

Abstract: A process for producing comprising reacting a 3-formyl-2,2-dimethylcyclopropanecarboxylate and propionitrile in the presence of a base to obtain 3-(2-cyano-1-propenyl)-2,2-dimethylcyclopropanecarboxylic acid or its salt.

Abstract: A method for producing an olefin compound represented by the formula (2): wherein R1 and R2 are the same or different, and independently represent an alkyl group or the like, with the proviso that R1 and R2 are not hydrogen atoms at the same time, R3 represents an alkyl group or the like, which comprises contacting a palladium catalyst with an ?,?-unsaturated aldehyde compound represented by the formula (1): wherein R1, R2 and R3 are the same as defined above, in the presence of an inorganic base.

Abstract: A process for producing an optically active cyclopropanecarboxylic acid ester compound represented by the formula (4): (wherein R5, R6 and * each represents the same meaning as defined below), comprising reacting a diazoacetic acid ester represented by the formula (2): N2CHCO2R5??(2) (wherein R5 represents an alkyl group having 1 to 15 carbon atoms or the like) with a compound represented by the formula (3): (wherein R6 represents an alkyl group having 1 to 15 carbon atoms or the like), in the presence of an asymmetric copper complex obtained by reacting a copper compound and an optically active salicylideneaminoalcohol compound represented by the formula (1): (wherein R1 represents an alkyl group having 1 to 4 carbon atoms or the like, R2 represents a hydrogen atom or the like, R3 and R4 independently represent a hydrogen atom or the like, and * represents an asymmetric center).

Abstract: A process for production of a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester comprising: (A) a step of obtaining a mixture containing a trans-2,2-dimethyl-3-(hydroxymethyl)cyclopropanecarboxylic acid ester, (B) a step of conducting an oxidation treatment of the mixture obtained in the step (A) to obtain a mixture containing a crude trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester, (C) a step of contacting the mixture obtained in the step (B) with an aqueous alkali metal hydrogen sulfite solution to obtain an alkali metal salt of a trans-2,2-dimethyl-3-[(hydroxy)(sulfo)methyl]cyclopropanecarboxylic acid ester, and (D) a step of contacting the alkali metal salt obtained in the above-mentioned step (C) with a base or the like to obtain a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester.

Abstract: A method for producing a purified formylcyclopropane compound represented by the formula (1) comprising (A) a step of reacting a crude formylcyclopropane compound represented by the formula (1): wherein R1 represents an alkyl group or the like, with an alkali metal hydrogen sulfite to obtain an alkali metal hydroxymethanesulfonate represented by the formula (2): wherein R1 represents the same meaning as defined above and M represents an alkali metal, and (B) a step of reacting an acid, a base or a water-soluble aldehyde with the alkali metal hydroxymethanesulfonate represented by the formula (2) obtained in the above-mentioned step (A) to obtain a purified formylcyclopropane compound represented by the formula (1).

Abstract: A method for producing a cyclopropanecarboxylic acid compound represented by formula (VI) (wherein R denotes the same as below), which comprising reacting a compound represented by formula (V) (wherein R denotes a chain hydrocarbon group having 1 to 10 carbon atoms or the like, and R1 denotes a chain hydrocarbon group having 1 to 10 carbon atoms optionally substituted with a halogen atom or the like) with an alkali metal borohydride compound in the presence of a solvent.

Abstract: A process for producing a trichloropyrimidine compound represented by the formula (2): wherein R represents a hydrogen atom etc., comprising reacting a dihydroxypyrimidine compound represented by the formula (1): wherein R represents the same meaning as above, with sulfuryl chloride and at least one chlorinating agent selected from the group consisting of hydrogen chloride, thionyl chloride, phosgene, phosphorus oxychloride, phosphorus pentachloride and phosphorus trichloride in the presence of an organic base.

Abstract: A method for producing a (2-formyl-1-alkenyl)cyclopropane compound represented by the formula (1): wherein R1 and R2 are the same or different, and independently represent a hydrogen atom, an optionally substituted alkyl group, an optionally substituted alkenyl group, an optionally substituted alkynyl group, an optionally substituted aryl group or an optionally substituted aralkyl group, which comprises reacting a formylcyclopropane compound represented by the formula (3): wherein R1 is the same as defined above, with an aldehyde compound represented by the formula (4): wherein R2 is the same as defined above, in the presence of a base.

Abstract: A process for production of a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester comprising: (A) a step of obtaining a mixture containing a trans-2,2-dimethyl-3-(hydroxymethyl)cyclopropanecarboxylic acid ester, (B) a step of conducting an oxidation treatment of the mixture obtained in the step (A) to obtain a mixture containing a crude trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester, (C) a step of contacting the mixture obtained in the step (B) with an aqueous alkali metal hydrogen sulfite solution to obtain an alkali metal salt of a trans-2,2-dimethyl-3-[(hydroxy)(sulfo)methyl]cyclopropanecarboxylic acid ester, and (D) a step of contacting the alkali metal salt obtained in the above-mentioned step (C) with a base or the like to obtain a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester.

Abstract: A method for producing a (2-formyl-1-alkenyl)cyclopropane compound represented by the formula (1): wherein R1 and R2 are the same or different, and independently represent a hydrogen atom, an optionally substituted alkyl group, an optionally substituted alkenyl group, an optionally substituted alkynyl group, an optionally substituted aryl group or an optionally substituted aralkyl group, which comprises reacting a formylcyclopropane compound represented by the formula (3): wherein R1 is the same as defined above, with an aldehyde compound represented by the formula (4): wherein R2 is the same as defined above, in the presence of a base.

Abstract: A method for producing an olefin compound represented by the formula (2): wherein R1 and R2 are the same or different, and independently represent an alkyl group or the like, with the proviso that R1 and R2 are not hydrogen atoms at the same time, R3 represents an alkyl group or the like, which comprises contacting a palladium catalyst with an ?,?-unsaturated aldehyde compound represented by the formula (1): wherein R1, R2 and R3 are the same as defined above, in the presence of an inorganic base.

Abstract: A process for the production of a 3,3-dimethyl-2-formylcyclopropanecarboxylic acid derivative of formula (2): wherein R is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl, which process comprises reacting a 3,3-dimethyl-2-(2-methyl-1-propenyl)cyclopropanecarboxylic acid compound of formula (1): wherein R is as defined above, with a periodic acid compound in the presence of a ruthenium compound.

Abstract: It is provided that a method for preparing disodium paraperiodate, characterized in that a pH of a reaction mixture which is obtained by reacting sodium iodate, iodic acid or a mixture thereof with sodium hypochlorite using sodium hydroxide is adjusted to the range between 5 and 10.

Abstract: A process for the production of a 3,3-dimethyl-2-formylcyclopropanecarboxylic acid derivative of formula (2): wherein R is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl, which process comprises reacting a 3,3-dimethyl-2-(2-methyl-1-propenyl)cyclopropanecarboxylic acid compound of formula (1): wherein R is as defined above, with a periodic acid compound in the presence of a ruthenium compound.