The pyrrole ring system is present in the amino acids proline and hydroxyproline; and in coloured natural products, such as chlorophyll, heme (a part of hemoglobin), and the bile pigments. Pyrrole compounds also are found among the alkaloids, a large class of alkaline organic nitrogen compounds produced by plants.

What is pyrrole used for?

The pyrrole ring represents a valuable framework for developing novel therapeutic agents. For example, pyrrole derivatives or molecules including a pyrrole nucleus, show interesting anti-microbial, anti-viral, anti-malarial, antitubercular, anti-inflammatory, enzyme inhibiting and, and anticancer properties.

Is pyrrole basic in nature?

Basic character can be explained by two factors: (i) Lone pair of electrons on the N atom is not readily available for protonation and hence pyrrole behaves as a weak base. (ii) Much weaker base than pyridine because lone pair of electrons involved in forming aromatic sextet.