Patent ID: 7491822

Claim:
A method for producing a compound represented by formula (3): wherein R 1 is an alkyl group optionally having one or more substituents, an aryl group optionally having one or more substituents or an aralkyl group optionally having one or more substituents; and R 2 is an alkyl group optionally having one or more substituents, an aryl group optionally having one or more substituents, an aralkyl group optionally having one or more substituents, or a group represented by the formula (a), the formula (b), or the formula (c): wherein R 3 is an alkyl group optionally having one or more substituents, an aryl group optionally having one or more substituents, or an aralkyl group optionally having one or more substituents; and R 4 is a hydrogen atom, an alkyl group optionally having one or more substituents, an aryl group optionally having one or more substituents or an aralkyl group optionally having one or more substituents, wherein said method comprises reacting a compound represented by formula (1): wherein M is a hydrogen atom or an alkali metal atom; a wavy line represents a cis form, a trans form, or a mixture thereof; and R 1 is as defined above, with a compound represented by formula (2): wherein R 2 is as defined above, or a salt thereof.