| abstract |
(57) [Summary] [Object] To provide an intermediate for producing an antibacterial compound and a method for producing the same. ## STR1 ## Formula (I): A compound represented by the formula (II): embedded image which is obtained by treating a compound represented by: with L-mandelic acid or D-mandelic acid in a solvent in which mandelic acid is difficult to dissolve. Or formula (III) And a method for obtaining them, and treating these compounds with a base to obtain optically active isomers of the compound of formula (I). (In the above formula, R is a lower alkyl group, A hydrogen atom, a phenylalkyl group, a trityl group or a benzhydryl group is meant, but when R is a substituent having a phenyl group, the phenyl group may have a nitro group, an alkoxyl group or a halogen atom as a substituent. Good. ) |