1
|
Kang X, Zhang M, Tang W, Gong J. Growth "self-inhibition" of irbesartan desmotrope: surface intra-annular tautomer inter-conversion is the culprit. Chem Commun (Camb) 2024; 60:3511-3514. [PMID: 38410911 DOI: 10.1039/d3cc06170a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
The newly discovered growth self-inhibition phenomenon of tautomeric crystals is now generalized to the demostrope (form B) of irbesartan that displays intra-annular tautomerism in neutral aqueous solutions. The dynamic intra-annular tautomer inter-conversion on the surface is the key factor. Our findings provide implications for producing and engineering tautomeric materials.
Collapse
Affiliation(s)
- Xiang Kang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Mingtao Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Weiwei Tang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemistry Science and Engineering, Tianjin 300072, China
| | - Junbo Gong
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemistry Science and Engineering, Tianjin 300072, China
| |
Collapse
|
2
|
Nowok A, Hellwig H, Dulski M, Książek M, Kusz J, Kuś P, Pawlus S. Revisiting Dynamic Processes and Relaxation Mechanisms in a Heterocyclic Glass-Former: Direct Observation of a Transient State. J Phys Chem B 2024; 128:1915-1926. [PMID: 38379513 PMCID: PMC10910497 DOI: 10.1021/acs.jpcb.3c06727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 01/10/2024] [Accepted: 02/07/2024] [Indexed: 02/22/2024]
Abstract
Despite decades of studies, a clear understanding of near-Tg phenomena remains challenging for glass-forming systems. This review delves into the intricate molecular dynamics of the small, heterocyclic thioether, 6-methyl-2,3-dihydro-1,4-benzodithiine (MeBzS2), with a particular focus on its near-Tg cold crystallization and relaxation mechanisms. Investigating isothermal crystallization kinetics at various temperatures reveals a significant interplay between its molecular dynamics and recrystallization from a supercooled liquid. We also identify two independent interconversion paths between energetically privileged conformers, characterized by strained transition states. We demonstrate that these spatial transformations induce substantial alterations in the dipole moment orientation and magnitude. Our investigation also extends to the complex salt PdCl2(MeBzS2), where we observe the transient conformers directly, revealing a direct relationship between their abundance and the local or macroscopic electric field. The initially energetically privileged isomers in an undisturbed system become less favored in the presence of an external electric field or ions, resulting even in an unexpected inversion of states. Consequently, we confirm the intramolecular character of secondary relaxation in MeBzS2 and its mechanism related to conformational changes within the heterocyclic ring. The research is based on the combination of broadband dielectric spectroscopy, X-ray diffraction, and quantum density functional theory calculations.
Collapse
Affiliation(s)
- Andrzej Nowok
- Department
of Experimental Physics, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, Wrocław 50-370, Poland
- Laboratoire
National des Champs Magnétiques Intenses, EMFL, CNRS UPR 3228,
Université Toulouse, Université
Toulouse 3, INSA-T, Toulouse 31400, France
| | - Hubert Hellwig
- Center
for Integrated Technology and Organic Synthesis (CiTOS), MolSys Research
Unit, University of Liège, B6a, Room 3/19, Allée Du
Six Août 13, Liège, Sart Tilman 4000, Belgium
| | - Mateusz Dulski
- Faculty
of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, Chorzów 41-500, Poland
| | - Maria Książek
- August
Chełkowski Institute of Physics, University
of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Joachim Kusz
- August
Chełkowski Institute of Physics, University
of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Piotr Kuś
- Institute
of Chemistry, University of Silesia in Katowice, Szkolna 9, Katowice 40-003, Poland
| | - Sebastian Pawlus
- August
Chełkowski Institute of Physics, University
of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| |
Collapse
|
3
|
Hellwig H, Nowok A, Peksa P, Dulski M, Musioł R, Pawlus S, Kuś P. Molecular Dynamics and Near- Tg Phenomena of Cyclic Thioethers. Int J Mol Sci 2023; 24:17166. [PMID: 38138995 PMCID: PMC10742681 DOI: 10.3390/ijms242417166] [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: 10/30/2023] [Revised: 11/20/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023] Open
Abstract
This article presents the synthesis and molecular dynamics investigation of three novel cyclic thioethers: 2,3-(4'-methylbenzo)-1,4,7,10-tetrathiacyclododeca-2-ene (compound 1), 2,3,14,15-bis(4',4″(5″)-methylbenzo)-1,4,7,10,13,16,19,22,25-octathiacyclotetracosa-2,14-diene (compound 2), and 2,3,8,9-bis(4',4″(5″)-methylbenzo)-1,4,7,10-tetrathiacyclododeca-2,8-diene (compound 3). The compounds exhibit relatively high glass transition temperatures (Tg), which range between 254 and 283 K. This characteristic positions them within the so-far limited category of crown-like glass-formers. We demonstrate that cyclic thioethers may span both the realms of ordinary and sizeable molecular glass-formers, each featuring distinct physical properties. Furthermore, we show that the Tg follows a sublinear power law as a function of the molar mass within this class of compounds. We also reveal multiple dielectric relaxation processes of the novel cyclic thioethers. Above the Tg, their dielectric loss spectra are dominated by a structural relaxation, which originates from the cooperative reorientation of entire molecules and exhibits an excess wing on its high-frequency slope. This feature has been attributed to the Johari-Goldstein (JG) process. Each investigated compound exhibits also at least one intramolecular secondary non-JG relaxation stemming from conformational changes. Their activation energies range from approximately 19 kJ/mol to roughly 40 kJ/mol. Finally, we analyze the high-pressure molecular dynamics of compound 1, revealing a pressure-induced increase in its Tg with a dTg/dp coefficient equal to 197 ± 8 K/GPa.
Collapse
Affiliation(s)
- Hubert Hellwig
- Center for Integrated Technology and Organic Synthesis (CiTOS), MolSys Research Unit, University of Liège, B6a, Room 3/19, Allée du Six Août 13, 4000 Liege, Belgium;
| | - Andrzej Nowok
- Department of Experimental Physics, Wrocław University of Science and Technology, Wybrzeże Stanisława Wyspiańskiego 27, 50-370 Wrocław, Poland; (A.N.); (P.P.)
| | - Paulina Peksa
- Department of Experimental Physics, Wrocław University of Science and Technology, Wybrzeże Stanisława Wyspiańskiego 27, 50-370 Wrocław, Poland; (A.N.); (P.P.)
| | - Mateusz Dulski
- Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland;
| | - Robert Musioł
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-003 Katowice, Poland;
| | - Sebastian Pawlus
- August Chełkowski Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland;
| | - Piotr Kuś
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-003 Katowice, Poland;
| |
Collapse
|
4
|
Tautomerism unveils a self-inhibition mechanism of crystallization. Nat Commun 2023; 14:561. [PMID: 36732334 PMCID: PMC9893984 DOI: 10.1038/s41467-023-35924-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 01/09/2023] [Indexed: 02/04/2023] Open
Abstract
Modifiers are commonly used in natural, biological, and synthetic crystallization to tailor the growth of diverse materials. Here, we identify tautomers as a new class of modifiers where the dynamic interconversion between solute and its corresponding tautomer(s) produces native crystal growth inhibitors. The macroscopic and microscopic effects imposed by inhibitor-crystal interactions reveal dual mechanisms of inhibition where tautomer occlusion within crystals that leads to natural bending, tunes elastic modulus, and selectively alters the rate of crystal dissolution. Our study focuses on ammonium urate crystallization and shows that the keto-enol form of urate, which exists as a minor tautomer, is a potent inhibitor that nearly suppresses crystal growth at select solution alkalinity and supersaturation. The generalizability of this phenomenon is demonstrated for two additional tautomers with relevance to biological systems and pharmaceuticals. These findings offer potential routes in crystal engineering to strategically control the mechanical or physicochemical properties of tautomeric materials.
Collapse
|
5
|
Rosenbaum T, Mbachu V, Mitchell NA, Gamble JF, Cho P, Engstrom JD. Comparison of One-Dimensional and Two-Dimensional Population Balance Models for Optimization of a Crystallization Process for a Needle-Shaped Active Pharmaceutical Ingredient. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.1c00344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tamar Rosenbaum
- Drug Product Science and Technology, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Victoria Mbachu
- Drug Product Science and Technology, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Niall Anthony Mitchell
- Process Systems Enterprise (PSE) − A Siemens Business, 6th Floor East, 26-28 Hammersmith Grove, London W6 7HA, United Kingdom
| | - John Francis Gamble
- Drug Product Science and Technology, Bristol-Myers Squibb, Moreton CH46 1QW, United Kingdom
| | - Patricia Cho
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Joshua D. Engstrom
- Drug Product Science and Technology, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| |
Collapse
|
6
|
|
7
|
Ashwathy P, Anto AT, Sudheesh MS. A mechanistic review on the dissolution phase behavior and supersaturation stabilization of amorphous solid dispersions. Drug Dev Ind Pharm 2021; 47:1-11. [PMID: 33494623 DOI: 10.1080/03639045.2021.1879843] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Amorphous solid dispersion (ASD) technology is an attractive formulation approach for poorly soluble drugs because of the supersaturated state acquired during its dissolution. The high thermodynamic activity of the supersaturated state of the drug is also a driver for the enhanced absorptive flux across a membrane. However, this advantage can easily be lost due to the inherent instability of supersaturation, causing drug precipitation. Stabilizing the supersaturated state during the dissolution of ASD for the relevant absorption time frame is a challenging area in formulation research. Stabilizing the supersaturated state by using polymeric excipients and understanding the phase behavior of drugs during dissolution are required for the optimal performance of ASD formulations. A number of confounding kinetic, formulation and physiological factors can influence the evolution of supersaturation and phase changes during dissolution of ASDs. The review highlights the complex nature of dissolution of ASDs and the need of biorelevant dissolution for proper risk assessment and optimizing formulation development.
Collapse
Affiliation(s)
- P Ashwathy
- Department of Pharmaceutics, Amrita School of Pharmacy, Kochi, India
| | - Akshaya T Anto
- Department of Pharmaceutics, Amrita School of Pharmacy, Kochi, India
| | - M S Sudheesh
- Department of Pharmaceutics, Amrita School of Pharmacy, Kochi, India
| |
Collapse
|
8
|
Tang SK, Davey RJ, Sacchi P, Cruz-Cabeza AJ. Can molecular flexibility control crystallization? The case of para substituted benzoic acids. Chem Sci 2020; 12:993-1000. [PMID: 34163865 PMCID: PMC8179050 DOI: 10.1039/d0sc05424k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Despite the technological importance of crystallization from solutions almost nothing is known about the relationship between the kinetic process of nucleation and the molecular and crystal structures of a crystallizing solute. Nowhere is this more apparent than in our attempts to understand the behavior of increasingly large, flexible molecules developed as active components in the pharmaceutical arena. In our current contribution we develop a general protocol involving a combination of computation (conformation analysis, lattice energy), and experiment (measurement of nucleation rates), and show how significant advances can be made. We present the first systematic study aimed at quantifying the impact of molecular flexibility on nucleation kinetics. The nucleation rates of 4 para substituted benzoic acids are compared, two of which have substituents with flexible chains. In making this comparison, the importance of normalizing data to account for differing solubilities is highlighted. These data have allowed us to go beyond popular qualitative descriptors such ‘crystallizability’ or ‘crystallization propensity’ in favour of more precise nucleation rate data. Overall, this leads to definite conclusions as to the relative importance of solution chemistry, solid-state interactions and conformational flexibility in the crystallization of these molecules and confirms the key role of intermolecular stacking interactions in determining relative nucleation rates. In a more general sense, conclusions are drawn as to conditions under which conformational change may become rate determining during a crystallization process. Little is known about the relationship between the kinetic process of nucleation and the molecular and crystal structures of a crystallizing solute. Here we compare the behaviour of a series of benzoic acids with a focus on conformational effects.![]()
Collapse
Affiliation(s)
- Sin Kim Tang
- Department of Chemical Engineering and Analytical Science, School of Engineering, University of Manchester M13PL UK
| | - Roger J Davey
- Department of Chemical Engineering and Analytical Science, School of Engineering, University of Manchester M13PL UK
| | - Pietro Sacchi
- Department of Chemical Engineering and Analytical Science, School of Engineering, University of Manchester M13PL UK
| | - Aurora J Cruz-Cabeza
- Department of Chemical Engineering and Analytical Science, School of Engineering, University of Manchester M13PL UK
| |
Collapse
|
9
|
Li X, Wang N, Yang J, Huang Y, Ji X, Huang X, Wang T, Wang H, Hao H. Molecular conformational evolution mechanism during nucleation of crystals in solution. IUCRJ 2020; 7:542-556. [PMID: 32431837 PMCID: PMC7201291 DOI: 10.1107/s2052252520004959] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 04/07/2020] [Indexed: 05/24/2023]
Abstract
Nucleation of crystals from solution is fundamental to many natural and industrial processes. In this work, the molecular mechanism of conformational polymorphism nucleation and the links between the molecular conformation in solutions and in crystals were investigated in detail by using 5-nitro-furazone as the model compound. Different polymorphs were prepared, and the conformations in solutions obtained by dissolving different polymorphs were analysed and compared. The solutions of 5-nitro-furazone were proven to contain multiple conformers through quantum chemical computation, Raman spectra analysis, 2D nuclear Overhauser effect spectroscopy spectra analysis and molecular dynamics simulation. The conformational evolution and desolvation path was illustrated according to the 1H NMR spectra of solutions with different concentrations. Finally, based on all the above analysis, the molecular conformational evolution path during nucleation of 5-nitro-furazone was illustrated. The results presented in this work shed a new light on the molecular mechanism of conformational polymorphism nucleation in solution.
Collapse
Affiliation(s)
- Xin Li
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Na Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Jinyue Yang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Yunhai Huang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Xiongtao Ji
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Xin Huang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Ting Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Honghai Wang
- School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, People’s Republic of China
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, People’s Republic of China
| |
Collapse
|
10
|
Wright SE, Bryant MJ, Cruz-Cabeza AJ. Is it usual to be unusual? An investigation into molecular conformations in organic crystals. CrystEngComm 2020. [DOI: 10.1039/c9ce02001b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Molecular conformations can influence the structure and properties of crystalline solids.
Collapse
Affiliation(s)
- Sarah E. Wright
- Department of Chemical Engineering and Analytical Science
- University of Manchester
- Manchester
- UK
| | | | - Aurora J. Cruz-Cabeza
- Department of Chemical Engineering and Analytical Science
- University of Manchester
- Manchester
- UK
- Chemical Development
| |
Collapse
|
11
|
Abstract
In this paper, theories on anisotropic crystal growth and crystallization of atropisomers are reviewed and a model for anisotropic crystal growth from solution containing slow inter-converting conformers is presented. The model applies to systems with growth-dominated crystallization from solutions and assumes that only one conformation participates in the solute integration step and is present in the crystal lattice. Other conformers, defined as the wrong conformers, must convert to the right conformer before they can assemble to the crystal lattice. The model presents a simple implicit method for evaluating the growth inhibition effect by the wrong conformers. The crystal growth model applies to anisotropic growth in two main directions, namely a slow-growing face and a fast-growing face and requires the knowledge of solute crystal face integration coefficients in both directions. A parameter estimation algorithm was derived to extract those coefficients from data about temporal concentration and crystal size during crystallization and was designed to have a short run time, while providing a high-resolution estimation. The model predicts a size-dependent growth rate and simulations indicated that for a given seed size and solvent system and for an isothermal anti-solvent addition crystallization, the seed loading and the supersaturation at seeding are the main factors impacting the final aspect ratio. The model predicts a decrease of the growth inhibition effect by the wrong conformer with increasing temperature, likely due to faster equilibration between conformers and/or a decrease of the population of the wrong conformer, if of low energy, at elevated temperatures. Finally, the model predicts that solute surface integration becomes the rate-limiting mechanism for high solute integration activation energies, resulting in no impact of the WC on the overall crystal growth process.
Collapse
|
12
|
Chen Q, Zou F, Yang P, Zhou J, Wu J, Zhuang W, Ying H. Transformation of microstructure and phase of disodium guanosine 5′-monophosphate: Thermodynamic perspectives. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2018.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
13
|
Zeglinski J, Kuhs M, Khamar D, Hegarty AC, Devi RK, Rasmuson ÅC. Crystal Nucleation of Tolbutamide in Solution: Relationship to Solvent, Solute Conformation, and Solution Structure. Chemistry 2018; 24:4916-4926. [PMID: 29431236 DOI: 10.1002/chem.201705954] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Jacek Zeglinski
- Materials and Surface Science Institute, Chemical and Environmental Science; University of Limerick; Limerick Ireland
| | - Manuel Kuhs
- Materials and Surface Science Institute, Chemical and Environmental Science; University of Limerick; Limerick Ireland
| | - Dikshitkumar Khamar
- Materials and Surface Science Institute, Chemical and Environmental Science; University of Limerick; Limerick Ireland
| | - Avril C. Hegarty
- MACSI, Department of Mathematics and Statistics; University of Limerick; Limerick Ireland
| | - Renuka K. Devi
- Materials and Surface Science Institute, Chemical and Environmental Science; University of Limerick; Limerick Ireland
| | - Åke C. Rasmuson
- Materials and Surface Science Institute, Chemical and Environmental Science; University of Limerick; Limerick Ireland
- Department of Chemical Engineering and Technology; KTH Royal Institute of Technology; Stockholm Sweden
| |
Collapse
|
14
|
Hsieh Y, Box K, Taylor LS. Assessing the Impact of Polymers on the pH‐Induced Precipitation Behavior of Poorly Water Soluble Compounds using Synchrotron Wide Angle X‐Ray Scattering. J Pharm Sci 2014; 103:2724-2735. [DOI: 10.1002/jps.23890] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 01/06/2014] [Accepted: 01/16/2014] [Indexed: 11/06/2022]
|
15
|
Trasi NS, Taylor LS. Nucleation and crystal growth of amorphous nilutamide – unusual low temperature behavior. CrystEngComm 2014. [DOI: 10.1039/c4ce00118d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
16
|
A review of the effect of multiple conformers on crystallization from solution and strategies for crystallizing slow inter-converting conformers. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2013.11.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
17
|
Threlfall TL, De’Ath RW, Coles SJ. Metastable Zone Widths, Conformational Multiplicity, and Seeding. Org Process Res Dev 2013. [DOI: 10.1021/op3003486] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Terence L. Threlfall
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Russell W. De’Ath
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Simon J. Coles
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| |
Collapse
|
18
|
Sanz D, Claramunt RM, Alkorta I, Sánchez-Sanz G, Elguero J. The structure of glibenclamide in the solid state. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2012; 50:246-255. [PMID: 22383432 DOI: 10.1002/mrc.2868] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 10/26/2011] [Accepted: 11/06/2011] [Indexed: 05/31/2023]
Abstract
The structure of glibenclamide, 5-chloro-N-(2-{4-[(cyclohexylamino)carbonyl] aminosulfonyl}phenyl) ethyl)-2-methoxybenzamide, an important antidiabetic drug, has been studied both in solution and in the solid state by a combination of NMR spectroscopy and theoretical calculations. The possibility that glibenclamide suffers a tautomerization under melting to afford a desmotrope was rejected.
Collapse
Affiliation(s)
- Dionisia Sanz
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain.
| | | | | | | | | |
Collapse
|