Anti-bacterial heterocyclic compounds and their synthesis

The invention relates to compounds of Formula I and Formula (B) along with their stereoisomers, pharmaceutically acceptable salts, complexes, hydrates, solvates, tautomers, polymorphs, racemic mixtures, optically active forms, and pharmaceutically active derivatives thereof. These compounds are useful for killing or inhibiting the growth of a microorganism selected from the group consisting of bacteria, virus, fungi, and protozoa.