| abstract |
The present invention provides an inexpensive and industrially advantageous method for producing an optically active form of an anti-(3S,4R)-3-alkylcarbamoyl-4-hydroxypyrrolidine derivative or it's enantiomer, which is a key intermediate for producing a high-quality optically active form of (3R,4S)-3-alkylaminomethyl-4-fluoropyrrolidine or it's enantiomer useful as an intermediate for producing pharmaceuticals. n The present invention relates to a method for producing an optically active anti-(3S,4R)-4-hydroxypyrrolidine-3-carboxamide derivative, or it's enantiomer by carrying out asymmetric hydrogenation using an optically active catalyst of a 4-oxopyrrolidine-3-carboxamide derivative represented by the general formula (I). n n n n n n n n n n n n [in the formula (I), PG 1 represents a protective group for an amino group, and R 1 represents hydrogen, a C1 to C6 alkyl group which may be substituted, or a C3 to C8 cycloalkyl group which may be substituted]. |