Diyana Dimitrova

Ms. Diyana Dimitrova

orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 January 2024 in Molecules
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Journal Article
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Iliyan IvanovIliyan Ivanov
Iliyan Ivanov
Stanimir ManolovStanimir Manolov
Stanimir Manolov
Dimitar Georgiev BojilovDimitar Georgiev Bojilov
Dimitar Georgiev Bojilov
GMGabriel Marc
Gabriel Marc
DDDiyana Dimitrova
Diyana Dimitrova
MSMaria Stoyanova
Maria Stoyanova
In this study, we present the synthesis of five novel compounds by combining flurbiprofen with various substituted 2-phenethylamines. The synthesized derivatives underwent comprehensive characterization using techniques such as 1H- and 13C-NMR spectroscopy, UV-Vis spectroscopy, and high-resolution mass spectrometry (HRMS). Detailed HRMS analysis was performed for each of these newly created molecules. The biological activities of these compounds were assessed through in vitro experiments to evaluate their potential as anti-inflammatory and antioxidant agents. Furthermore, the lipophilicity of these derivatives was determined, both theoretically using the cLogP method and experimentally through partition coefficient (RM) measurements. To gain insights into their binding affinity, we conducted an in silico analysis of the compounds’ interactions with human serum albumin (HSA) using molecular docking studies. Our findings reveal that all of the newly synthesized compounds exhibit significant anti-inflammatory and antioxidant activities, with results statistically comparable to the reference compounds. Molecular docking studies further explain the observed in vitro results, shedding light on the molecular mechanisms behind their biological activities. Using in silico method, toxicity was calculated, resulting in LD50 values. Depending on the administration route, the novel flurbiprofen derivatives show lower toxicity compared to the standard flurbiprofen.

3 June 2024 in Molbank
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Journal Article
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DDDiyana Dimitrova
Diyana Dimitrova
Stanimir ManolovStanimir Manolov
Stanimir Manolov
Dimitar Georgiev BojilovDimitar Georgiev Bojilov
Dimitar Georgiev Bojilov
Iliyan IvanovIliyan Ivanov
Iliyan Ivanov
PNParaskev Todorov Nedialkov
Paraskev Todorov Nedialkov
In this study, we report the synthesis of (±)-2-chloro-N-(4-methyl-2-oxo-2H-chromen-7-yl)-2-phenylacetamide through the reaction of 7-amino-4-methyl-2H-chromen-2-one with (±)-2-chloro-2-phenylacetyl chloride. The in vitro anti-inflammatory activity of the new compound was evaluated, and the results indicated that it exhibited superior activity compared to the standard, ibuprofen. The bio-functional hybrid compound underwent thorough detailed characterization utilizing 1H and 13C NMR, UV, and mass spectral analysis.

9 September 2024 in Molbank
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Journal Article
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Iliyan IvanovIliyan Ivanov
Iliyan Ivanov
Stanimir ManolovStanimir Manolov
Stanimir Manolov
Dimitar Georgiev BojilovDimitar Georgiev Bojilov
Dimitar Georgiev Bojilov
DDDiyana Dimitrova
Diyana Dimitrova
PNParaskev Todorov Nedialkov
Paraskev Todorov Nedialkov
Herein we report the synthesis of three novel sulfonamide derivatives of trimetazidine—medication primarily used to treat angina pectoris. The new compounds have been fully characterized with their melting point, 1H- and 13C-NMR, UV, and mass spectrometry. The collected data confirm the successful synthesis and structural integrity of the new molecules.

12 February 2024 in Molbank
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Journal Article
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DDDiyana Dimitrova
Diyana Dimitrova
Stanimir ManolovStanimir Manolov
Stanimir Manolov
Iliyan IvanovIliyan Ivanov
Iliyan Ivanov
Dimitar Georgiev BojilovDimitar Georgiev Bojilov
Dimitar Georgiev Bojilov
LKLyusi Kasamova
Lyusi Kasamova
PNParaskev Todorov Nedialkov
Paraskev Todorov Nedialkov
In this study, we outline the eco-friendly mechanosynthesis of N-(2,2-diphenylethyl)-4-nitrobenzamide by reacting 2,2-diphenylethan-1-amine with 4-nitrobenzoyl chloride. The resulting bio-functional hybrid compound was meticulously characterized through the analysis of 1H-, 13C-NMR, UV, and detailed mass spectral analysis.

23 August 2025 in Pharmaceuticals
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DDDiyana Dimitrova
Diyana Dimitrova
Stanimir ManolovStanimir Manolov
Stanimir Manolov
Iliyan IvanovIliyan Ivanov
Iliyan Ivanov
Dimitar Georgiev BojilovDimitar Georgiev Bojilov
Dimitar Georgiev Bojilov
NDNikol Dimova
Nikol Dimova
OOOvidiu Oniga
Ovidiu Oniga
Background: Trimetazidine is a clinically established cardioprotective agent with anti-ischemic and antioxidant properties, widely used in the management of coronary artery disease. Combining its metabolic and cytoprotective effects with the potent anti-inflammatory activity of profens presents a promising therapeutic strategy. Methods: Five novel trimetazidine–profen hybrid compounds were synthesized using N,N′-dicyclohexylcarbodiimide-mediated coupling and structurally characterized by NMR and high-resolution mass spectrometry. Their antioxidant activity was evaluated by hydroxyl radical scavenging assays (HRSA), and the anti-inflammatory potential was assessed via the inhibition of albumin denaturation (IAD). Lipophilicity was determined chromatographically. Molecular docking and 100 ns molecular dynamics simulations were performed to investigate the binding modes and stability in human serum albumin (HSA) binding sites. The acute toxicity of the hybrid molecules was predicted in silico using GUSAR software. Results: All synthesized hybrids demonstrated varying degrees of biological activity, with compound 3c exhibiting the most potent antioxidant (HRSA IC₅₀ = 71.13 µg/mL) and anti-inflammatory (IAD IC₅₀ = 108.58 µg/mL) effects. Lipophilicity assays indicated moderate membrane permeability, with compounds 3c and 3d showing favorable profiles. Docking studies revealed stronger binding affinities of S-enantiomers, particularly 3c and 3d, to Sudlow sites II and III in HSA. Molecular dynamics simulations confirmed stable ligand–protein complexes, highlighting compound 3c as maintaining consistent and robust interactions. The toxicity results indicate that most hybrids, particularly compounds 3b–3d, exhibit a favorable safety profile compared to the parent trimetazidine. Conclusion: The hybrid trimetazidine–profen compounds synthesized herein, especially compound 3c, demonstrate promising dual antioxidant and anti-inflammatory therapeutic potential. Their stable interaction with serum albumin and balanced physicochemical properties support further development as novel agents for managing ischemic heart disease and associated inflammatory conditions.

13 February 2025 in Molbank
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Journal Article
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Iliyan IvanovIliyan Ivanov
Iliyan Ivanov
Stanimir ManolovStanimir Manolov
Stanimir Manolov
DDDiyana Dimitrova
Diyana Dimitrova
PNParaskev Todorov Nedialkov
Paraskev Todorov Nedialkov
Herein, we present the synthesis of N-(4-methoxyphenethyl)-2-oxo-2H-chromene-3-carboxamide. The synthesized compound has been thoroughly characterized using melting point analysis, 1H- and 13C-NMR spectroscopy, infrared spectroscopy, and mass spectrometry. The comprehensive data obtained from these techniques confirm the successful synthesis and structural integrity of the newly synthesized molecule.