Heterocyclic Compound

Heterocyclic compounds are organic molecules containing ring structures in which one or more carbon atoms are replaced by heteroatoms such as nitrogen, oxygen, or sulfur. The presence of these heteroatoms significantly alters the electronic distribution, polarity, and reactivity of the ring system. As a result, heterocycles can participate in a wide range of chemical interactions and serve as key structural motifs for controlling molecular recognition, binding affinity, and biological activity.