Use of stereoselective transaminase in asymmetric synthesis of chiral amine

A compound of Formula II, a pharmaceutically acceptable salt thereof, or a stereoisomer thereof:

• wherein,
• R1 is selected from the group consisting of none, oxo (═O), halogen, —OH, —NH2, substituted or unsubstituted C1-C8 alkyl, substituted or unsubstituted C3-C8 cycloalkyl, substituted or unsubstituted C1-C8 alkoxy, substituted and unsubstituted C3-C8 cycloalkoxy;
• R2 is selected from the group consisting of none, halogen, —OH, —NH2, substituted or unsubstituted C1-C8 alkyl, substituted or unsubstituted C3-C8 cycloalkyl, substituted or unsubstituted C1-C8 alkoxy, substituted and unsubstituted C3-C8 cycloalkoxy;
• X is selected from the group consisting of:
• C and N;
• Y is selected from the group consisting of:
• C, N, O, and S;
• wherein R2 is none when Y is O or S.