Abstract
Background: Every year Invasive Fungal Infections (IFI) are globally affecting millions
of people. Candida albicans and Aspergillus niger have been reported as the most infectious
and mortality-inducing fungal strains among all pathogenic fungi.
Aims & Objectives: To tackle this problem in the current study Pyranopyrazoles and Pyrazolopyrano-
pyrimidine derivatives were developed using molecular hybridization, green chemistry
and one-pot multicomponent reaction.
Materials and Methods: In the present work, New Chemical entities (NCE’s) were developed
on the basis of Structure activity relationship. All designed NCE’s were screened for ADMET
studies using the QikProp module of Schrodinger software. NCE’s with zero violations were
further docked on the crystal structure of 14α demethylase, cytochrome P450 and thymidine
synthase (PDB ID: 5V5Z, 7SHI, 1BID). Selected molecules were synthesized using green
chemistry techniques and evaluated for in vitro antifungal activity against Candida albicans and
Aspergillus niger.
Results and Discussion: Designed NCE’s (B1-12 and C1-11) showed favorable results in ADMET
studies. In the docking study six compounds from series-B and five molecules from series-
C showed good dock score and binding interaction when compared with the standard drugs.
Compounds B-3 and C-4 showed the highest zone of inhibition activity against Candida albicans,
where as B-1 and C-3 had shown highest zone of inhibition activity against Aspergillus
niger.
Conclusion: Bicyclic ring (series B) showed better activity as compare to fused tricyclic ring
(series C).
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