Heterocyclic compounds have played an important role in the evolution of life, as dyes, drugs and are also used in many commercially important species. Pyrroles and their derivatives exhibit different important biological activities like antibacterial, antioxidant, cytotoxic, insecticidal, anti-inflammatory, anticoagulant, antiallergic, antiarhythmic, hypotensive and anticonvulsant etc. Benzylideneacetophenones play an ecological role in nature, in relation to plant colour. These brightly yellow coloured compounds are found in many plant organs, but most conspicuously in flowers....