Patent ID: 7714141

Claim:
A process for producing a compound represented by formula (3): (wherein R 1a , R 1b , R 2a , and R 2b , which may be identical to or different from one another, each represents a hydrogen atom, a halogen atom, a nitro group, a C 1-4 alkyl group, a trifluoromethyl group, a C 1-4 alkoxy group, a di-C 1-4 alkylamino group, a C 1-4 alkylsulfonyloxy group, a C 1-4 alkylsulfonyl group, or a C 1-4 alkylthio group, wherein R 1a and R1b may be linked to each other to form an alkylenedioxy group, or R 2a and R 2b may be linked to each other to form an alkylenedioxy group; X represents an oxygen atom, a sulfur atom, or N—R 3 (wherein R 3 represents a hydrogen atom or a C 1-4 alkyl group); Y represents an oxygen atom, an S(O) l group (wherein l is an integer of 0 or 2), a carbonyl group, or a carbonylamino group; n is an integer of 1 to 6; m is an integer of 2 to 6; and the symbol “*” denotes asymmetric S or R configuration), characterized in that the process comprises reacting a compound represented by formula (1): (wherein R 1a , R 1b , R 2a , R 2b , X, Y, m, and n have the same meanings as defined above) with optically active 2-trifluoromethanesulfonyloxybutyrolactone represented by formula (2a): (wherein the symbol “*” denotes asymmetric S or R configuration) in the presence of a base, or with optically active 2-hydroxybutyrolactone represented by formula (2b): (wherein the symbol “*” denotes asymmetric S or R configuration) under Mitsunobu reaction conditions.