421573-08-2

Upstream product

• 13323-66-5 2',4-dihydroxychalcone 
• 34000-31-2 2',4-dihydroxychalcone 
• 118-93-4 o-hydroxyacetophenone 
• 123-08-0 4-hydroxy-benzaldehyde 
• 82522-51-8 1-(4-hydroxyphenyl), 3-(2-hydroxyphenyl) prop-2-ene-1-one 

Downstream Products

• 1082036-86-9 C₁₇H₁₅ClN₂O₃ 
• 1208112-44-0 3-(2-hydroxyphenyl)-5-(4-hydroxyphenyl)-1N-benzoyl-4,5-dihydro-1H-pyrazole 
• 1208112-46-2 3-(2-hydroxyphenyl)-5-(4-hydroxyphenyl)-1N-(benzenesulphonyl)-4,5-dihydro-1H-pyrazole 
• 1208112-48-4 3-(2-hydroxyphenyl)-5-(4-hydroxyphenyl)-1N-(4-methyl benzenesulphonyl)-4,5-dihydro-1H-pyrazole 
• 1344115-19-0 C₁₆H₁₅N₃O₄ 

Relevant academic research and scientific papers

Mycobactin Analogues with Excellent Pharmacokinetic Profile Demonstrate Potent Antitubercular Specific Activity and Exceptional Efflux Pump Inhibition

In this study, we have designed and synthesized pyrazoline analogues that partially mimic the structure of mycobactin, to address the requirement of novel therapeutics to tackle the emerging global challenge of antimicrobial resistance (AMR). Our investigation resulted in the identification of novel lead compounds 44 and 49 as potential mycobactin biosynthesis inhibitors against mycobacteria. Moreover, candidates efficiently eradicated intracellularly surviving mycobacteria. Thermofluorimetric analysis and molecular dynamics simulations suggested that compounds 44 and 49 bind to salicyl-AMP ligase (MbtA), a key enzyme in the mycobactin biosynthetic pathway. To the best of our knowledge, these are the first rationally designed mycobactin inhibitors to demonstrate an excellent in vivo pharmacokinetic profile. In addition, these compounds also exhibited more potent whole-cell efflux pump inhibition than known efflux pump inhibitors verapamil and chlorpromazine. Results from this study pave the way for the development of 3-(2-hydroxyphenyl)-5-(aryl)-pyrazolines as a new weapon against superbug-associated AMR challenges.

Synthesis, Structure, and Anti-Inflammatory Activity of Functionally Substituted Chalcones and Their Derivatives

Functionally substituted chalcones, pyrazolines, and flavonones have been synthesized. Their structure has been studied by means of 1H and 13C NMR spectroscopy, including COSY and HMQC experiments. Anti-inflammatory activity of the s

2-pyrazoline derivatives in neuropharmacology: Synthesis, adme prediction, molecular docking and in vivo biological evaluation

A novel series of 1,3,5-trisubstituted-2-pyrazoline derivatives (PFC-1 to PFC-16) were synthesized in a three step reaction using conventional and microwave assisted green chemistry approach. The synthesized derivatives were characterized and their chemic

Facile One-Pot Synthesis Methodology for Nitrogen-Containing Heterocyclic Derivatives of 3,5-Disubstituted 4,5-Dihydro-1H-Pyrazole, Their Biological Evaluation and Molecular Docking Studies

A series of 2-pyrazoline derivatives (PS-1 to PS-16) were synthesized by reacting different aromatic/heteroaromatic aldehydes and ketones, in a two-step reaction through Claisen – Schmidt condensation, followed by cyclization of the resulting chalcones wi

Design and synthesis of 3,5-diaryl-4,5-dihydro-1H-pyrazoles as new tyrosinase inhibitors

In this study, twenty 3,5-diaryl-4,5-dihydro-1H-pyrazole derivatives with hydroxyl(s) (1a-1p, 2a-2d) were synthesized and their inhibitory activity on mushroom tyrosinase was examined. The results showed that among these compounds, 1-(5-(3,4-dihydroxyphenyl)-3-(4-hydroxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl) ethanone 1d was found to be the most potent tyrosinase inhibitor with IC 50 value of 0.301 μM. Kinetic study revealed that these compounds were competitive inhibitors of tyrosinase and their structure-activity relationships were investigated in this article.

Chemical scaffolds with structural similarities to siderophores of nonribosomal peptide-polyketide origin as novel antimicrobials against Mycobacterium tuberculosis and Yersinia pestis

Mycobacterium tuberculosis (Mtb) and Yersinia pestis (Yp) produce siderophores with scaffolds of nonribosomal peptide-polyketide origin. Compounds with structural similarities to these siderophores were synthesized and evaluated as antimicrobials against Mtb and Yp under iron-limiting conditions mimicking the iron scarcity these pathogens encounter in the host and under standard iron-rich conditions. Several new antimicrobials were identified, including some with increased potency in the iron-limiting condition. Our study illustrates the possibility of screening compound libraries in both iron-rich and iron-limiting conditions to identify antimicrobials that may selectively target iron scarcity-adapted bacteria and highlights the usefulness of building combinatorial libraries of compounds having scaffolds with structural similarities to siderophores to feed into antimicrobial screening programs.

Towards development of selective and reversible pyrazoline based MAO-inhibitors: Synthesis, biological evaluation and docking studies

Ten novel 3,5-diaryl pyrazolines were synthesized and investigated for their monoamine oxidase (MAO) inhibitory property. All the molecules were found to be reversible and selective inhibitor for either one of the isoform (MAO-A or MAO-B). Further insights in the theoretical evaluation of the possible interactions between the compounds and monoamine oxidases (MAO-A or MAO-B) have been developed through docking studies. The theoretical values are in congruence with their experimental values.

Pyrazoline-based mycobactin analogues as MAO-inhibitors

3,5-Diaryl carbothioamide pyrazolines designed as mycobactin analogs (mycobacterial siderophore) were reported to be potent antitubercular agents under iron limiting condition in our earlier study. Clinical complications of newly introduced antibiotic Linezolid, due its MAO inhibitory activity, prompted us to evaluate our compounds for their MAO-inhibitory activity against rat liver MAO-A and MAO-B as pyrazolines were reported to be antidepressants and MAO inhibitors. The present study carried out with this pilot library of 32 compounds will provide us with necessary information for designing antitubercular molecules with reduced MAO-inhibitory activity and also help us in identifying a selective MAO-B inhibitor which has potential clinical utility in neurodegenerative disorders. Thirty-two compounds analyzed has shown spectrum of activity from selective to nonselective against two isoforms of rat liver MAO-A and MAO-B and also as competitive, reversible to non-competitive, irreversible. It is also interesting to note that anti-tubercular compound 11, 14 and 16 were also found to be selective inhibitors of rat liver MAO-B. Docking studies with human MAO shows that compound 11 interacts with the catalytic site of both the isoforms, suggesting compound 11 as nonselective inhibitor of human MAO isoforms.

Small molecules with structural similarities to siderophores as novel antimicrobials against Mycobacterium tuberculosis and Yersinia pestis

Drugs inhibiting the iron scarcity-induced, siderophore-mediated iron-scavenging systems of Mycobacterium tuberculosis (Mtb) and Yersinia pestis (Yp) may provide new therapeutic lines of defense. Compounds with structural similarities to siderophores were synthesized and evaluated as antimicrobials against Mtb and Yp under iron-limiting conditions, which mimic the iron scarcity these pathogens encounter and must adapt to in the host, and under standard iron-rich conditions for comparison. New antimicrobials were identified, some of which warrant exploration as initial leads against potentially novel targets and small-molecule tools to assist in the elucidation of targets specific to iron-scarcity adapted Mtb and Yp.

Microwave induced synthesis and anti microbial activities of some [3-(2-hydroxyphenyl)-5-aryl-2-pyrazolinyl]-4-thiazolidenones

A series of new [3-(2-hydroxyphenyl)-5-aryl-2-pyrazolinyi]-4- thiazolidenones (4a-g.) has been prepared by microwave irradiation technique. O-hydroxy chalcones (1) were treated with hydrazine hydrate to afford corresponding pyrazolines (2) which were trea