Abstract
Synthesis of benzalacetophenones (1a-c) has been achieved by the aldol condensation of substituted acetophenone with benzaldehyde. These were treated with thiourea by utilizing HCl to give substituted dihydropyrimidine-thiones (2a-c). Cyclization of these compounds with DMF and chloroacetic acid yielded pyrimidothiazolidinone moieties (3a-c). Reaction of benzaldehyde with 3a-c produced corresponding chalcone derivatives (4a-c). These chalcone derivatives when treated with guanidine nitrate in presence of a base gave (5a-c). Condensation of 5a-c with bromoethoxyphthalimide afforded titled compounds (6a-c). Structures of prepared scaffolds were established by the spectral studies, elemental analysis and chemical tests. Subsequently, heterocyclic hybrids (5a-c, 6a-c) were assayed to their in vitro anti-microbial activity against a variety of infectious strains of bacteria and fungi.
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