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Todorova SE, Rusew RI, Petkova ZS, Shivachev BL, Nikolova RP, Kurteva VB. Acylpyrazolones possessing a heterocyclic moiety in the acyl fragment: intramolecular vs. intermolecular zwitterionic structures. NEW J CHEM 2022. [DOI: 10.1039/d1nj05458a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of acylpyrazolones possessing a methylene bridged heterocyclic unit in the acyl fragment are synthesized and characterized in solution and the solid state.
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Affiliation(s)
- Stanislava E. Todorova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 9, Sofia 1113, Bulgaria
| | - Rusi I. Rusew
- Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 107, Sofia 1113, Bulgaria
| | - Zhanina S. Petkova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 9, Sofia 1113, Bulgaria
| | - Boris L. Shivachev
- Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 107, Sofia 1113, Bulgaria
| | - Rositsa P. Nikolova
- Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 107, Sofia 1113, Bulgaria
| | - Vanya B. Kurteva
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 9, Sofia 1113, Bulgaria
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Araya-Sibaja AM, Maduro de Campos CE, Fandaruff C, Vega-Baudrit JR, Guillén-Girón T, Navarro-Hoyos M, Cuffini SL. Irbesartan desmotropes: Solid-state characterization, thermodynamic study and dissolution properties. J Pharm Anal 2019; 9:339-346. [PMID: 31929943 PMCID: PMC6951487 DOI: 10.1016/j.jpha.2019.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 11/01/2022] Open
Abstract
Irbesartan (IBS) is a tetrazole derivative and antihypertensive drug that has two interconvertible structures, 1H- and 2H-tautomers. The difference between them lies in the protonation of the tetrazole ring. In the solid-state, both tautomers can be isolated as crystal forms A (1H-tautomer) and B (2H-tautomer). Studies have reported that IBS is a polymorphic system and its forms A and B are related monotropically. These reports indicate form B as the most stable and less soluble form. Therefore, the goal of this contribution is to demonstrate through a complete solid-state characterization, thermodynamic study and dissolution properties that the IBS forms are desmotropes that are not related monotropically. However, the intention is also to call attention to the importance of conducting strict chemical and in solid-state quality controls on the IBS raw materials. Hence, powder X-ray diffraction (PXRD) and Raman spectroscopy (RS) at ambient and non-ambient conditions, differential scanning calorimetry (DSC), hot stage microscopy (HSM), Fourier transform infrared (FT-IR) and scanning electron microscopy (SEM) techniques were applied. Furthermore, intrinsic dissolution rate (IDR) and structural stability studies at 98% relative humidity (RH), 25 °C and 40 °C were conducted as well. The results show that in fact, form A is approximately four-fold more soluble than form B. In addition, both IBS forms are stable at ambient conditions. Nevertheless, structural and/or chemical instability was observed in form B at 40 °C and 98% RH. IBS has been confirmed as a desmotropic system rather than a polymorphic one. Consequently, forms A and B are not related monotropically.
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Affiliation(s)
- Andrea Mariela Araya-Sibaja
- Laboratorio Nacional de Nanotecnología LANOTEC-CeNAT-CONARE, 1174-1200, Pavas, San José, Costa Rica
- Escuela de Ciencia e Ingeniería de los Materiales, Tecnológico de Costa Rica, Cartago, 159-7050, Costa Rica
- Escuela de Química, Universidad de Costa Rica, San Pedro de Montes de Oca, 2060, San José, Costa Rica
| | | | | | - José Roberto Vega-Baudrit
- Laboratorio Nacional de Nanotecnología LANOTEC-CeNAT-CONARE, 1174-1200, Pavas, San José, Costa Rica
- Laboratorio de Investigación y Tecnología de Polímeros POLIUNA, Escuela de Química, Universidad Nacional de Costa Rica, Heredia, 86-3000, Costa Rica
| | - Teodolito Guillén-Girón
- Escuela de Ciencia e Ingeniería de los Materiales, Tecnológico de Costa Rica, Cartago, 159-7050, Costa Rica
| | - Mirtha Navarro-Hoyos
- Escuela de Química, Universidad de Costa Rica, San Pedro de Montes de Oca, 2060, San José, Costa Rica
| | - Silvia Lucía Cuffini
- Instituto de Ciência e Técnica, Universidade Federal de São Paulo, São José dos Campos, São Paulo, Brazil
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Pettinari R, Marchetti F, Pettinari C, Condello F, Skelton BW, White AH, Chierotti MR, Gobetto R. Self-assembly of arene ruthenium acylpyrazolone fragments to tetranuclear metallacycles. Molecular structures and solid-state 15N CPMAS NMR correlations. Dalton Trans 2016; 45:3974-82. [DOI: 10.1039/c6dt00168h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mono- and tetranuclear Ru(ii) half-sandwich complexes containing acylpyrazolone ligands. 13C and 15N solid state NMR spectroscopy.
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Affiliation(s)
| | - Fabio Marchetti
- School of Science and Technology
- University of Camerino
- 62032 Camerino
- Italy
| | | | | | - Brian W. Skelton
- School of Chemistry and Biochemistry M310
- The University of Western Australia
- Crawley
- Australia
| | - Allan H. White
- Centre for Microscopy
- Characterization and Analysis M010
- The University of Western Australia
- Crawley
- Australia
| | | | - Roberto Gobetto
- Dipartimento di Chimica and NIS Centre
- University of Torino
- 10125 Torino
- Italy
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Atanassova M, Kurteva V. Synergism as a phenomenon in solvent extraction of 4f-elements with calixarenes. RSC Adv 2016. [DOI: 10.1039/c5ra22306g] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The objective of the review is to provide an overview on the synergistic solvent extraction of lanthanoids: β-diketone/calixarene mixtures.
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Affiliation(s)
- Maria Atanassova
- University of Chemical Technology and Metallurgy
- Department of General and Inorganic Chemistry
- 1756 Sofia
- Bulgaria
- University of Grenoble Alpes
| | - Vanya Kurteva
- Institute of Organic Chemistry with Centre of Phytochemistry
- Bulgarian Academy of Sciences
- Sofia
- Bulgaria
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