Method for producing an optically active bicyclic γ- amino acid derivative

In the present invention, an optically active bicyclic γ- amino acid derivative, and an object thereof is to provide a high purity. Its solution is the general formula (I) and mixtures of the compounds of general formula having (I '), or via a compound (I), compounds of general formula (VII), or to produce a salt thereof it is a method. [Formula 1] [In the formula, ] ## STR2 ##