Abstract
In this work, the dipyrromethane derivatives 2a,b were synthesized from an aldehyde and excess of pyrrole at room temperature in solvent-free conditions. The reaction of dipyrromethanes 2a,b with different aromatic aldehydes in the presence of hydrochloric acid or p-toluenesulfonic acid as a catalyst afforded some new porphyrin like and A2B2 porphyrin derivatives 4a-g and 5a-d, respectively. Biological evaluation of the newly synthesized compounds 4a-g and 5a-d showed promising activity as antimicrobial and antioxidant agents. Compounds 4c,4e,4g,5c, and 5d exhibited the highest antimicrobial activity, whereas, compounds 4a,4f,5a,5b, and 5d recorded the highest antioxidant activity.
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