| abstract |
mixtures of compounds, compounds, and methods for producing a compound and for separating a compound the purpose of the present invention is to provide a high purity optically active (upsilon) -bicyclic amino acid derivative. the means for carrying out this process consists of a method for the production of a compound representing by the general formula (vii) (vii) or a salt thereof, by means of a mixture of compound represented by the general formula (i) and the general formula (i ') (i) (i') or by means of compound (i). formulas (i) and (i ') [in formulas, r1 and r2 each denote a C1-6 alkyl group or the like, and r3 denotes a cyano group or the like]. |