Method for producing optically active 2-cyclopenten-4-one-1-ol esters, 2- cyclopenteno-4-one-1-ol ester and complexes thereof with optically active 1,6-diphenyl-2,4-hexadiyne-1,6-diol

摘要

A method for producing an optically active 2-cyclopenten-4-one- 1-ol ester useful as an intermediate for medicines, agricultural chemicals and represented by the general formula (I), ##STR1## wherein R represents a saturated or unsaturated aliphatic hydrocarbon residue which may or may not be substituted with a halogen atom, and a mark * represents an asymmetric carbon,PPwhich comprises bringing a 2- cyclopenten-4-one-1-ol ester represented by the general formula ##STR2## wherein R represents a saturated or unsaturated aliphatic hydrocarbon residue which may or may not be substituted with a halogen atom, into contact with an optically active 1,6-diphenyl-2,4- hexadiyne-1,6-diol derivative represented by the general formula (II), ##STR3## wherein R' represents a halogenated phenyl, lower alkylphenyl, naphthyl or tertiary lower alkyl group, and a mark * represents an asymmetric carbon,P Pin an organic solvent to obtain an optically active cyclopentenone ester complex which is a bound product of the optically active 2-cyclopenten-4-one-1-ol ester represented by the foregoing general formula (I) with the optically active 1,6-diphenyl-2,4- hexadiyne- 1,6-diol derivative represented by the foregoing general formula (II), and then decomposing the resulting optically active cyclopentenone ester complex.