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Worzakowska M, Sztanke K, Sztanke M. Studies on the Thermal Decomposition Course of Nitrogen-Rich Heterocyclic Esters as Potential Drug Candidates and Evaluation of Their Thermal Stability and Properties. Int J Mol Sci 2024; 25:4768. [PMID: 38731989 PMCID: PMC11084317 DOI: 10.3390/ijms25094768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
Drug candidates must undergo thermal evaluation as early as possible in the preclinical phase of drug development because undesirable changes in their structure and physicochemical properties may result in decreased pharmacological activity or enhanced toxicity. Hence, the detailed evaluation of nitrogen-rich heterocyclic esters as potential drug candidates, i.e., imidazolidinoannelated triazinylformic acid ethyl esters 1-3 (where R1 = 4-CH3 or 4-OCH3 or 4-Cl, and R2 = -COOC2H5) and imidazolidinoannelated triazinylacetic acid methyl esters 4-6 (where R1 = 4-CH3 or 4-OCH3 or 4-Cl, and R2 = -CH2COOCH3)-in terms of their melting points, melting enthalpy values, thermal stabilities, pyrolysis, and oxidative decomposition course-has been carried out, using the simultaneous thermal analysis methods (TG/DTG/DSC) coupled with spectroscopic techniques (FTIR and QMS). It was found that the melting process (documented as one sharp peak related to the solid-liquid phase transition) of the investigated esters proceeded without their thermal decomposition. It was confirmed that the melting points of the tested compounds increased in relation to R1 and R2 as follows: 2 (R1 = 4-OCH3; R2 = -COOC2H5) < 6 (R1 = 4-Cl; R2 = -CH2COOCH3) < 5 (R1 = 4-OCH3; R2 = -CH2COOCH3) < 3 (R1 = 4-Cl; R2 = -COOC2H5) < 1 (R1 = 4-CH3; R2 = -COOC2H5) < 4 (R1 = 4-CH3; R2 = -CH2COOCH3). All polynitrogenated heterocyclic esters proved to be thermally stable up to 250 °C in inert and oxidising conditions, although 1-3 were characterised by higher thermal stability compared to 4-6. The results confirmed that both the pyrolysis and the oxidative decomposition of heterocyclic ethyl formates/methyl acetates with para-substitutions at the phenyl moiety proceed according to the radical mechanism. In inert conditions, the pyrolysis process of the studied molecules occurred with the homolytic breaking of the C-C, C-N, and C-O bonds. This led to the emission of alcohol (ethanol in the case of 1-3 or methanol in the case of 4-6), NH3, HCN, HNCO, aldehydes, CO2, CH4, HCl, aromatics, and H2O. In turn, in the presence of air, cleavage of the C-C, C-N, and C-O bonds connected with some oxidation and combustion processes took place. This led to the emission of the corresponding alcohol depending on the analysed class of heterocyclic esters, NH3, HCN, HNCO, aldehydes, N2, NO/NO2, CO, CO2, HCl, aromatics, and H2O. Additionally, after some biological tests, it was proven that all nitrogen-rich heterocyclic esters-as potential drug candidates-are safe for erythrocytes, and some of them are able to protect red blood cells from oxidative stress-induced damage.
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Affiliation(s)
- Marta Worzakowska
- Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, 33 Gliniana Street, 20-614 Lublin, Poland;
| | - Krzysztof Sztanke
- Laboratory of Bioorganic Compounds Synthesis and Analysis, Medical University of Lublin, 4A Chodźki Street, 20-093 Lublin, Poland;
| | - Małgorzata Sztanke
- Department of Medical Chemistry, Medical University of Lublin, 4A Chodźki Street, 20-093 Lublin, Poland
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Taldaev A, Pankov DI, Terekhov RP, Zhevlakova AK, Selivanova IA. Modification of the Physicochemical Properties of Active Pharmaceutical Ingredients via Lyophilization. Pharmaceutics 2023; 15:2607. [PMID: 38004585 PMCID: PMC10674228 DOI: 10.3390/pharmaceutics15112607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/03/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Bioavailability is an important biopharmaceutical characteristic of active pharmaceutical ingredients (APIs) that is often correlated with their solubility in water. One of the methods of increasing solubility is freeze drying (lyophilization). The article provides a systematic review of studies published from 2012 to 2022 aimed at optimizing the properties of active pharmaceutical ingredients by freeze drying. This review was carried out in accordance with the recommendations of Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). In general, 141 modifications of 36 APIs attributed to 12 pharmacological groups were reported in selected publications. To characterize the products of phase modification after lyophilization, a complex of analytical methods was used, including microscopic, thermal, X-ray, and spectral approaches. Solubility and pharmacokinetic parameters were assessed. There is a tendency to increase solubility due to the amorphization of APIs during lyophilization. Thus, the alcohol lyophilizate of dihydroquercetin is "soluble" in water compared to the initial substance belonging to the category "very poorly soluble". Based on the analysis of the literature, it can be argued that lyophilization is a promising method for optimizing the properties of APIs.
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Affiliation(s)
- Amir Taldaev
- Institute of Biomedical Chemistry, 119121 Moscow, Russia
- Phystech School of Biological and Medical Physics, Moscow Institute of Physics and Technology, Institutskiy per. 9, 141701 Moscow, Russia
| | - Denis I. Pankov
- Nelyubin Institute of Pharmacy, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Roman P. Terekhov
- Nelyubin Institute of Pharmacy, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Anastasia K. Zhevlakova
- Nelyubin Institute of Pharmacy, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Irina A. Selivanova
- Nelyubin Institute of Pharmacy, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
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Chen F, Xu XH, Chen ZH, Chen Y, Qing FL. Visible-light-induced nickel-catalyzed α-hydroxytrifluoroethylation of alkyl carboxylic acids: Access to trifluoromethyl alkyl acyloins. Beilstein J Org Chem 2023; 19:1372-1378. [PMID: 37736392 PMCID: PMC10509543 DOI: 10.3762/bjoc.19.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 08/30/2023] [Indexed: 09/23/2023] Open
Abstract
A visible-light-induced nickel-catalyzed cross coupling of alkyl carboxylic acids with N-trifluoroethoxyphthalimide is described. Under purple light irradiation, an α-hydroxytrifluoroethyl radical generated from a photoactive electron donor-acceptor complex between Hantzsch ester and N-trifluoroethoxyphthalimide was subsequently engaged in a nickel-catalyzed coupling reaction with in situ-activated alkyl carboxylic acids. This convenient protocol does not require photocatalysts and metal reductants, providing a straightforward and efficient access to trifluoromethyl alkyl acyloins in good yields with broad substrate compatibility. The complex bioactive molecules were also compatible with this catalytic system to afford the corresponding products.
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Affiliation(s)
- Feng Chen
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Xiu-Hua Xu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Zeng-Hao Chen
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Yue Chen
- Shandong Dongyue Polymer Material Co., Ltd., Zibo 256401, China
| | - Feng-Ling Qing
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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Taldaev A, Savina AD, Olicheva VV, Ivanov SV, Terekhov RP, Ilyasov IR, Zhevlakova AK, Selivanova IA. Protective Properties of Spheroidal Taxifolin Form in Streptozotocin-Induced Diabetic Rats. Int J Mol Sci 2023; 24:11962. [PMID: 37569337 PMCID: PMC10418707 DOI: 10.3390/ijms241511962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/19/2023] [Accepted: 07/23/2023] [Indexed: 08/13/2023] Open
Abstract
One of the key factors in the pathogenesis of diabetes and its complications is oxidative stress. To inhibit this process, antioxidants may be helpful. Herein, we focused on the protective properties of taxifolin spheroidal form (TS) in the streptozotocin rat model of diabetes mellitus. After 4 weeks of treatment with TS, the fasting blood glucose level of the diabetic animals decreased by 12% compared with the level right after the injection of streptozotocin. While the feed intake in the untreated diabetic rats increased by 5.3% compared with the healthy group, the TS-treated group showed a pronounced 15.3% decrease. Therapeutic administration of TS has a protective effect on the pancreas and the liver against the cytotoxic action of streptozotocin. The plasma antioxidant capacity of all diabetic groups appeared to be approximately 15% lower than in healthy rats with no significant difference between the TS-treated and untreated diabetic animals. Apparently, this can be attributed to taxifolin and plasma proteins binding. These data demonstrate the potential of TS in antidiabetic therapy.
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Affiliation(s)
- Amir Taldaev
- Laboratory of Nanobiotechnology, Institute of Biomedical Chemistry, Pogodinskaya Str. 10/8, 119121 Moscow, Russia
| | - Anastasiya D. Savina
- Nelubin Institute of Pharmacy, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia
| | - Vera V. Olicheva
- Nelubin Institute of Pharmacy, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia
| | - Sergey V. Ivanov
- Laboratory of Psychopharmacology, V.V. Zakusov Research Institute of Pharmacology, 125315 Moscow, Russia
| | - Roman P. Terekhov
- Nelubin Institute of Pharmacy, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia
| | - Igor R. Ilyasov
- Nelubin Institute of Pharmacy, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia
| | - Anastasiya K. Zhevlakova
- Nelubin Institute of Pharmacy, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia
| | - Irina A. Selivanova
- Nelubin Institute of Pharmacy, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia
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Solubility Enhancement of Dihydroquercetin via "Green" Phase Modification. Int J Mol Sci 2022; 23:ijms232415965. [PMID: 36555607 PMCID: PMC9785474 DOI: 10.3390/ijms232415965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/29/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Dihydroquercetin (DHQ) is a promising antioxidant for medical applications. The poor water solubility of this flavanonol at ambient conditions inhibits its implementation in clinical practice as an injectable dosage form. Thus, increasing water solubility is a critical step toward solving this problem. Herein we attempted to deal with this problem via DHQ phase modification while at the same time adhering to the principles of green chemistry as much as possible. Lyophilization is an appropriate method to achieve phase modification in an environment-friendly way. This method was employed to generate new phase modifications of DHQ that were then characterized. Mixtures of water with ethanol or acetonitrile were used as solvents for the preparation of the lyophilizates, DHQE, and DHQA, respectively. The results of dissolution testing of the obtained DHQE and DHQA demonstrated that the lyophilization increased water solubility at least 30-fold times. These new DHQ modifications were studied by scanning electron microscopy, mass-spectrometry, nuclear magnetic resonance spectroscopy, infrared spectroscopy, X-ray powder diffraction, and thermal analysis. Their solid-state phases were confirmed to differ from the initial DHQ substance without any changes in the molecular structure. Both DHQE and DHQA showed as high antioxidant activity as the initial DHQ. These data demonstrate the potential of DHQE and DHQA as active pharmaceutical ingredients for injectable dosage forms.
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Orlova SV, Tatarinov VV, Nikitina EA, Sheremeta AV, Ivlev VA, Vasil’ev VG, Paliy KV, Goryainov SV. Bioavailability and Safety of Dihydroquercetin (Review). Pharm Chem J 2022; 55:1133-1137. [PMID: 35194263 PMCID: PMC8831168 DOI: 10.1007/s11094-022-02548-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Indexed: 11/29/2022]
Abstract
Dihydroquercetin (DHQ) is a bioflavonoid with high antioxidant, capillary-protective, and anti-inflammatory activity. DHQ has previously been used for treating Middle East respiratory syndrome coronavirus (MERS-CoV) infection and is currently considered a potential regulator of oxidative stress as part of COVID-19 multipurpose therapy. DHQ has a high safety profile but low bioavailability that limits its use. Innovative techniques (liposomization, crystal engineering, etc.) can be used to increase its bioavailability.
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Affiliation(s)
- S. V. Orlova
- Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya St., Moscow, 117198 Russia
| | - V. V. Tatarinov
- A. P. Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences, 1A Favorskogo St., P. O. Box 9, Irkutsk, 664033 Russia
| | - E. A. Nikitina
- Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya St., Moscow, 117198 Russia
| | - A. V. Sheremeta
- Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya St., Moscow, 117198 Russia
| | - V. A. Ivlev
- Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya St., Moscow, 117198 Russia
| | - V. G. Vasil’ev
- Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya St., Moscow, 117198 Russia
| | - K. V. Paliy
- Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya St., Moscow, 117198 Russia
| | - S. V. Goryainov
- Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya St., Moscow, 117198 Russia
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COŞGUN MS, ÇOŞKUN R, CELIK AI. The preventive effect of taxifolin on acrylamide-induced heart damage in rats. REV NUTR 2022. [DOI: 10.1590/1678-9865202235e210079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
ABSTRACT Objective Acrylamide is a toxic compound widely used in industrial sectors. Acrylamide causes reactive oxygen species formation and the subsequent lipid peroxidation reaction, which plays an important role in the pathogenesis of oxidative damage. Taxifolin is a flavonoid with antioxidant properties that inhibit reactive oxygen species formation. In this study, we aimed to investigate the preventive effect of taxifolin on acrylamide-induced oxidative heart damage. Methods The rats were divided into three groups: Acrylamide, Acrylamide+Taxifolin , and Healthy group. Water and food intake and body weight alterations were recorded daily. Malondialdehyde, total glutathione, nuclear factor kappa-B, total oxidant status, and total antioxidant status levels were analyzed from the heart tissue. Troponin-I levels, the parameter known as a cardiac biomarker, were analyzed from the blood sample. The cardiac histopathologic examination was also performed. Results In the Acrylamide group animals, the malondialdehyde, nuclear factor kappa-B, total oxidant status, and troponin-I levels were significantly higher compared to the ones of Acrylamide+Taxifolin and Healthy groups. The levels of total glutathione and total antioxidant status were significantly lower compared to Acrylamide+Taxifolin and Healthy groups’. Additionally, in the Acrylamide group, body weight gain, food and water intake, significantly declined compared to the Acrylamide+Taxifolin and Healthy groups. However, in the Acrylamide+Taxifolin group, taxifolin supplementation brought these values close to Healthy group ones. Furthermore, taxifolin treatment ameliorated structural myocardial damage signs induced by acrylamide. Conclusion Acrylamide exposure significantly induced oxidative damage to rat heart tissue. Taxifolin was able to improve the toxic consequences of acrylamide biochemically and histopathologically, possibly due to its antioxidant properties.
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