Received: August 11, 2018;   Published: August 21, 2018

DOI: 10.32474/DDIPIJ.2018.02.000132

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Abstract

The irrational use of antimicrobial agents for several decades has led to the drug-resistance among the patient population. Overcoming the present drug-resistance is a major challenge for modern day scientists. In order to counter this problem, several approaches have been utilized, one of which involve drug design and discovery, where new classes or unexplored chemical moieties are explored for a particular activity, either serendipitously or quite rationally. Learning lessons from the previously synthesized four compounds (Part-I of Research), we have now (Part-II of Research) designed two compounds (3 and 5) by incorporating an additional 4-(2-aminoethyl) aniline group in the fabricated isoindoline-1,3-dione scaffold by successive synthetic step utilizing similar protocol and screened them against the above four mentioned pathogenic microbes in a similar way. The present exploration is an attempt to rationally overcome the microbial drug resistance by the efficacious and potent nature of the compounds. Compound (5) exhibited the highest activity against A. niger with ZOI diameter of >29mm. All the compounds showed more or less nearly the same activity. From this study, it may be concluded that substituting the amine/amide-based components leads to an increase in the potency of the compared along with better-anti-fungal activity. Therefore, the current exploration helped to design the compounds which have better potency than our previous reports and also providing imperative knowledge regarding the selection of the substituents. The encouraging results will further motivate us in developing novel and better inhibitors of phthalimide scaffold in the future.

Keywords: Antimicrobial; Antifungal; Antibacterial; Phthalimide; Isoindoline; Synthesis