Heterocyclic compounds useful as anti-bacterial agents and method for production

A compound of Formula I

• or stereoisomers, pharmaceutically acceptable salts, complexes, hydrates, solvates, tautomers, polymorphs, racemic mixtures, or optically active forms thereof, wherein
• R1 is selected from the group consisting of hydrogen, C1-6 alkyl, C2-6 alkenyl, and C3-C6 cycloalkyl, each of which is unsubstituted or substituted with 1 to 3 groups independently selected from halogen, amino, hydroxy, oxetane, —OC1-6 alkyl, C3-6 cycloalkylamino, C1-6 alkylamino, or di(C1-6 alkyl)amino;
• R2 is selected from the group consisting of hydrogen, hydroxyl, and amino;
• X is —NH, —NC1-6 alkyl, O, or CR3R4;
• R3 and R4 are independently selected from the group consisting of hydrogen, halogen, and C1-6 alkyl;
• Y1 is N or CR5;
• R5 is selected from the group consisting of hydrogen, halogen, cyano, —OC1-6 alkyl, —OC1-6 haloalkyl, and C1-6 alkyl;
• Y2 is N or CH;
• Y3 is N or CR6;
• R6 is selected from the group consisting of hydrogen, halogen, cyano, C1-6 alkyl, —OC1-6 alkyl, and —OC1-6 haloalkyl;
• Z1 is NH when Z2 is C1-6 alkylene;
• or Z1 is C1-6 alkylene when Z2 is NH;
• n is 1 or 2;
• W is CH2 wherein dotted line () represents no bond;
• W is O when dotted line () represents either a bond or no bond;
• Ring A is selected from the group consisting of