METHOD FOR PRODUCING PURIFIED FORMYLCYCLOPROPANE COMPOUND AND INTERMEDIATE OF SUCH FORMYLCYCLOPROPANE COMPOUND

摘要

Disclosed is a method for producing a purified formylcyclopropane compound represented by the formula (1) below which is characterized by comprising a step (A) wherein a hydroxymethanesulfonic acid alkali metal salt represented by the formula (2) below is obtained by reacting a crude formylcyclopropane compound represented by the formula (1) below with an alkali metal hydrogensulfite; and a step (B) wherein a purified formylcyclopropane compound represented by the formula (1) below is obtained by reacting an acid, a base or a water-soluble aldehyde with the hydroxymethanesulfonic acid alkali metal salt represented by the formula (2) below which is obtained in the step (A). (In the formula, R1 represents an alkyl group or the like.) (In the formula, R1 is as defined above and M represents an alkali metal.)