Synthesis and characterization of biologically significant 5,5′-(1,4-phenylene)bis(1-N-alkoxyphthalimido-3-aryl-2-pyrazoline) derivatives

Abstract

A facile synthesis of 5,5 0 -(1,4-phenylene)bis(3-aryl-2-pyrazolines) 4a-g has been achieved by the cyclo-addition reaction of hydrazine hydrate with bis-substituted chalcones 3a-g, which in turn were prepared by the Clasien-Schmidt condensation of p-substituted acetophenones 1a-g with terephthaldehyde. Condensation of 4a-g with v-bromoalkoxyphthalimides 5a-b afforded the titled compounds 6a-n, some of which exhibited significant antimalarial as well as antimicrobial activity.