1
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Ezekiel C, Jadhav S, Stevens LL, MacGillivray LR. Assessing Structures and Solution Behaviors of Molecular and Ionic Cocrystals with a Common Bioactive Molecule: 2,4-Pyridinedicarboxylic Acid with Tranexamic Acid and Nicotinamide. CRYSTAL GROWTH & DESIGN 2024; 24:6618-6624. [PMID: 39185356 PMCID: PMC11342296 DOI: 10.1021/acs.cgd.4c00525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 08/27/2024]
Abstract
Cocrystals of 2,4-pyridinedicarboxylic acid (PDA) with either nicotinamide (NTD) or tranexamic acid (TXA) as (PDA)·(NTD) and 2(PDA)·(TXA), respectively, are reported, with the former being a molecular cocrystal and the latter being an ionic cocrystal. Single-crystal structure analyses showed that PDA and its coformers are sustained by neutral and ionic hydrogen bonds. Suspensions of (PDA)·(NTD) resulted in complete conversion to PDA monohydrate after 48 h, while 2(PDA)·(TXA) was thermodynamically stable at a lower pH and showed a 2-fold increase in the PDA concentration, relative to pure PDA monohydrate under similar conditions. Thermal characterization of 2(PDA)·(TXA) displayed a lower melting point and a lower heat of fusion, relative to the pure components. Powder dissolution studies were evaluated for PDA, (PDA)·(NTD), and 2(PDA)·(TXA) and the corresponding physical mixtures. The percent of PDA dissolved rapidly reached near 100% for most cases; however, for 2(PDA)·(TXA), complete dissolution was not achieved, and the amount of PDA dissolved decreased to 85% after 3 h. Instability of 2(PDA)·(TXA) was likely a result of a high solution pH during dissolution, and our results confirm that the solution pH plays a key role in determining the solution behavior and phase stability of the cocrystals.
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Affiliation(s)
| | - Sanika Jadhav
- Department
of Pharmaceutical Sciences and Experimental Therapeutics, College
of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Lewis L. Stevens
- Department
of Pharmaceutical Sciences and Experimental Therapeutics, College
of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Leonard R. MacGillivray
- Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
- Department
of Chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
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2
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Julien PA, Arhangelskis M, Germann LS, Etter M, Dinnebier RE, Morris AJ, Friščić T. Illuminating milling mechanochemistry by tandem real-time fluorescence emission and Raman spectroscopy monitoring. Chem Sci 2023; 14:12121-12132. [PMID: 37969588 PMCID: PMC10631231 DOI: 10.1039/d3sc04082h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 10/07/2023] [Indexed: 11/17/2023] Open
Abstract
In pursuit of accessible and interpretable methods for direct and real-time observation of mechanochemical reactions, we demonstrate a tandem spectroscopic method for monitoring of ball-milling transformations combining fluorescence emission and Raman spectroscopy, accompanied by high-level molecular and periodic density-functional theory (DFT) calculations, including periodic time-dependent (TD-DFT) modelling of solid-state fluorescence spectra. This proof-of-principle report presents this readily accessible dual-spectroscopy technique as capable of observing changes to the supramolecular structure of the model pharmaceutical system indometacin during mechanochemical polymorph transformation and cocrystallisation. The observed time-resolved in situ spectroscopic and kinetic data are supported by ex situ X-ray diffraction and solid-state nuclear magnetic resonance spectroscopy measurements. The application of first principles (ab initio) calculations enabled the elucidation of how changes in crystalline environment, that result from mechanochemical reactions, affect vibrational and electronic excited states of molecules. The herein explored interpretation of both real-time and ex situ spectroscopic data through ab initio calculations provides an entry into developing a detailed mechanistic understanding of mechanochemical milling processes and highlights the challenges of using real-time spectroscopy.
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Affiliation(s)
- Patrick A Julien
- Department of Chemistry, McGill University 801 Sherbrooke St. W. H3A 0B8 Montreal Canada
- Department of Chemistry and Chemical Engineering, Royal Military College of Canada 13 General Crerar Crescent K7K 7B4 Kingston Canada
| | - Mihails Arhangelskis
- Department of Chemistry, McGill University 801 Sherbrooke St. W. H3A 0B8 Montreal Canada
- Faculty of Chemistry, University of Warsaw 1 Pasteura St. 02-093 Warsaw Poland
| | - Luzia S Germann
- Department of Chemistry, McGill University 801 Sherbrooke St. W. H3A 0B8 Montreal Canada
- Max-Planck Institute for Solid State Research Heisenbergstrasse 1 D-70569 Stuttgart Germany
| | - Martin Etter
- Deutsches-Elektronen Synchrotron (DESY) Notkestrasse 85 22607 Hamburg Germany
| | - Robert E Dinnebier
- Max-Planck Institute for Solid State Research Heisenbergstrasse 1 D-70569 Stuttgart Germany
| | - Andrew J Morris
- School of Metallurgy and Materials, University of Birmingham Birmingham B15 2TT UK
| | - Tomislav Friščić
- Department of Chemistry, McGill University 801 Sherbrooke St. W. H3A 0B8 Montreal Canada
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
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3
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Feng X, Becke AD, Johnson ER. Theoretical investigation of polymorph- and coformer-dependent photoluminescence in molecular crystals. CrystEngComm 2021. [DOI: 10.1039/d1ce00383f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel density-functional approach provides accurate predictions for the colour zoning of ROY polymorphs and the fluorescence energies of a family of 9-acetylanthracene cocrystals.
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Affiliation(s)
- Xibo Feng
- Department of Chemistry
- Dalhousie University
- Halifax
- Canada
| | - Axel D. Becke
- Department of Chemistry
- Dalhousie University
- Halifax
- Canada
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4
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Feng X, Becke AD, Johnson ER. Computational modeling of piezochromism in molecular crystals. J Chem Phys 2020; 152:234106. [DOI: 10.1063/5.0011515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Xibo Feng
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| | - Axel D. Becke
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| | - Erin R. Johnson
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
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5
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Zheng K, Gao S, Chen M, Li A, Wu W, Qian S, Pang Q. Color tuning of an active pharmaceutical ingredient through cocrystallization: a case study of a metronidazole–pyrogallol cocrystal. CrystEngComm 2020. [DOI: 10.1039/c9ce01726g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The visual color of antimicrobial drug metronidazole is tuned through cocrystallization with pyrogallol, offering a new modification approach.
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Affiliation(s)
- Kang Zheng
- Laboratory of Developmental and Evolutionary Biology
- School of Life Sciences
- Shandong University of Technology
- Zibo
- China
| | - Sijia Gao
- Laboratory of Developmental and Evolutionary Biology
- School of Life Sciences
- Shandong University of Technology
- Zibo
- China
| | - Meishan Chen
- Laboratory of Developmental and Evolutionary Biology
- School of Life Sciences
- Shandong University of Technology
- Zibo
- China
| | - Ao Li
- Laboratory of Developmental and Evolutionary Biology
- School of Life Sciences
- Shandong University of Technology
- Zibo
- China
| | - Weiwei Wu
- Laboratory of Developmental and Evolutionary Biology
- School of Life Sciences
- Shandong University of Technology
- Zibo
- China
| | - Shaosong Qian
- Laboratory of Developmental and Evolutionary Biology
- School of Life Sciences
- Shandong University of Technology
- Zibo
- China
| | - Qiuxiang Pang
- Laboratory of Developmental and Evolutionary Biology
- School of Life Sciences
- Shandong University of Technology
- Zibo
- China
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6
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Arhangelskis M, Jochym DB, Bernasconi L, Friščić T, Morris AJ, Jones W. Time-Dependent Density-Functional Theory for Modeling Solid-State Fluorescence Emission of Organic Multicomponent Crystals. J Phys Chem A 2018; 122:7514-7521. [DOI: 10.1021/acs.jpca.8b03481] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mihails Arhangelskis
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- Department of Chemistry, McGill University, 801 Sherbrooke Street W., Montreal H3A 0B8, Québec, Canada
| | - Dominik B. Jochym
- STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | | | - Tomislav Friščić
- Department of Chemistry, McGill University, 801 Sherbrooke Street W., Montreal H3A 0B8, Québec, Canada
| | - Andrew J. Morris
- School of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - William Jones
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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7
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Drug‑Drug and Drug‑Nutraceutical Cocrystal/Salt as Alternative Medicine for Combination Therapy: A Crystal Engineering Approach. CRYSTALS 2018. [DOI: 10.3390/cryst8020101] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Cerreia Vioglio P, Chierotti MR, Gobetto R. Pharmaceutical aspects of salt and cocrystal forms of APIs and characterization challenges. Adv Drug Deliv Rev 2017; 117:86-110. [PMID: 28687273 DOI: 10.1016/j.addr.2017.07.001] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/23/2017] [Accepted: 07/03/2017] [Indexed: 11/28/2022]
Abstract
In recent years many efforts have been devoted to the screening and the study of new solid-state forms of old active pharmaceutical ingredients (APIs) with salification or co-crystallization processes, thus modulating final properties without changing the pharmacological nature. Salts, hydrates/solvates, and cocrystals are the common solid-state forms employed. They offer the intriguing possibility of exploring different pharmaceutical properties for a single API in the quest of enhancing the final drug product. New synthetic strategies and advanced characterization techniques have been recently proposed in this hot topic for pharmaceutical companies. This paper reviews the recent progresses in the field particularly focusing on the characterization challenges encountered when the nature of the solid-state form must be determined. The aim of this article is to offer the state-of-the-art on this subject in order to develop new insights and to promote cooperative efforts in the fascinating field of API salt and cocrystal forms.
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Affiliation(s)
| | - Michele R Chierotti
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Roberto Gobetto
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy.
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9
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Mukaida M, Sato H, Sugano K, Terada K. Stability Orders of Acetaminophen and Theophylline Co-crystals Determined by Co-crystal Former Exchange Reactions and Their Correlation With In Silico and Thermal Parameters. J Pharm Sci 2017; 106:258-263. [DOI: 10.1016/j.xphs.2016.08.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 08/08/2016] [Accepted: 08/31/2016] [Indexed: 11/17/2022]
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10
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Arhangelskis M, Eddleston MD, Reid DG, Day GM, Bučar DK, Morris AJ, Jones W. Rationalization of the Color Properties of Fluorescein in the Solid State: A Combined Computational and Experimental Study. Chemistry 2016; 22:10065-73. [PMID: 27303817 PMCID: PMC4982065 DOI: 10.1002/chem.201601340] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Indexed: 11/10/2022]
Abstract
Fluorescein is known to exist in three tautomeric forms defined as quinoid, zwitterionic, and lactoid. In the solid state, the quinoid and zwitterionic forms give rise to red and yellow materials, respectively. The lactoid form has not been crystallized pure, although its cocrystal and solvate forms exhibit colors ranging from yellow to green. An explanation for the observed colors of the crystals is found using a combination of UV/Vis spectroscopy and plane-wave DFT calculations. The role of cocrystal coformers in modifying crystal color is also established. Several new crystal structures are determined using a combination of X-ray and electron diffraction, solid-state NMR spectroscopy, and crystal structure prediction (CSP). The protocol presented herein may be used to predict color properties of materials prior to their synthesis.
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Affiliation(s)
- Mihails Arhangelskis
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Mark D Eddleston
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - David G Reid
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Graeme M Day
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| | - Dejan-Krešimir Bučar
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Andrew J Morris
- Theory of Condensed Matter Group, Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge, CB3 0HE, UK
| | - William Jones
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
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11
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Synthesis, experimental and theoretical studies of two cocrystals in 1:1 stoichiometric ratio from 4,4′-bithiazole-2,2′-diamine with two hydrogen acceptor molecules. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0972-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Hiendrawan S, Veriansyah B, Widjojokusumo E, Soewandhi SN, Wikarsa S, Tjandrawinata RR. Physicochemical and mechanical properties of paracetamol cocrystal with 5-nitroisophthalic acid. Int J Pharm 2015; 497:106-13. [PMID: 26657269 DOI: 10.1016/j.ijpharm.2015.12.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 11/06/2015] [Accepted: 12/02/2015] [Indexed: 02/09/2023]
Abstract
We report novel pharmaceutical cocrystal of a popular antipyretic drug paracetamol (PCA) with coformer 5-nitroisophhthalic acid (5NIP) to improve its tabletability. The cocrystal (PCA-5NIP at molar ratio of 1:1) was synthesized by solvent evaporation technique using methanol as solvent. The physicochemical properties of cocrystal were characterized by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), fourier transform infrared spectroscopy (FTIR), hot stage polarized microscopy (HSPM) and scanning electron microscopy (SEM). Stability of the cocrystal was assessed by storing them at 40°C/75% RH for one month. Compared to PCA, the cocrystal displayed superior tableting performance. PCA-5NIP cocrystal showed a similar dissolution profile as compared to PCA and exhibited good stability. This study showed the utility of PCA-5NIP cocrystal for improving mechanical properties of PCA.
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Affiliation(s)
- Stevanus Hiendrawan
- Dexa Laboratories of Biomolecular Sciences, Cikarang 17550, West Java, Indonesia; School of Pharmacy, Bandung Institute of Technology, Bandung 40132, West Java, Indonesia
| | - Bambang Veriansyah
- Dexa Laboratories of Biomolecular Sciences, Cikarang 17550, West Java, Indonesia
| | - Edward Widjojokusumo
- Dexa Laboratories of Biomolecular Sciences, Cikarang 17550, West Java, Indonesia
| | | | - Saleh Wikarsa
- School of Pharmacy, Bandung Institute of Technology, Bandung 40132, West Java, Indonesia
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13
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Pallipurath A, Skelton JM, Delori A, Duffy C, Erxleben A, Jones W. Crystalline adducts of the Lawsone molecule (2-hydroxy-1,4-naphthaquinone): optical properties and computational modelling. CrystEngComm 2015. [DOI: 10.1039/c5ce01644d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystal-engineering techniques allow the colour of the molecule in henna dye (Lawsone) to be tuned from yellow to red.
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Affiliation(s)
| | | | - Amit Delori
- Department of Chemistry
- University of Cambridge
- Cambridge, UK
| | - Connor Duffy
- School of Chemistry
- National University of Ireland
- Galway, Ireland
| | - Andrea Erxleben
- School of Chemistry
- National University of Ireland
- Galway, Ireland
| | - William Jones
- Department of Chemistry
- University of Cambridge
- Cambridge, UK
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14
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Maeno Y, Fukami T, Kawahata M, Yamaguchi K, Tagami T, Ozeki T, Suzuki T, Tomono K. Novel pharmaceutical cocrystal consisting of paracetamol and trimethylglycine, a new promising cocrystal former. Int J Pharm 2014; 473:179-86. [DOI: 10.1016/j.ijpharm.2014.07.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 06/04/2014] [Accepted: 07/02/2014] [Indexed: 10/25/2022]
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15
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Jones CL, Wilson CC, Thomas LH. Turning colour on and off using molecular disorder and proton transfer in multi-component molecular complexes. CrystEngComm 2014. [DOI: 10.1039/c4ce00229f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three pairs of molecular complexes based around 4-iodoaniline and 3,5-dinitrobenzoic acid are reported. Within each pair, one complex is colourless and one red; the influences on the colour are discussed including the role of molecular disorder and proton transfer.
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16
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Hamdy LB, Raithby PR, Thomas LH, Wilson CC. Self-assembly synthesis of precursors to potential open framework alkali earth metal–organic complexes. NEW J CHEM 2014. [DOI: 10.1039/c3nj01218b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of magnesium pyridinecarboxylic–dicarboxylic acid complexes, synthesised as precursors to potential framework materials, show a range of metal ligand and hydrogen bonding geometries. The pyridinedicarboxylic complexes show most promise as precursors for further syntheses.
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17
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Steed JW. The role of co-crystals in pharmaceutical design. Trends Pharmacol Sci 2013; 34:185-93. [PMID: 23347591 DOI: 10.1016/j.tips.2012.12.003] [Citation(s) in RCA: 180] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 12/13/2012] [Accepted: 12/14/2012] [Indexed: 11/16/2022]
Abstract
Pharmaceutical co-crystal formation represents a straightforward way to dramatically influence the solid-state properties of a drug substance, particularly its solubility and hence bioavailability. This short review summarises this highly topical field, covering why the topic is of interest in pharmaceutical formulation, the definitions and practical scope of co-crystals, co-crystal preparation and characterisation, and implications for regulatory control and intellectual property (IP) protection. Concepts are illustrated with highly selected examples of pharmaceutical co-crystal systems within the wider context of crystal engineering and research in molecular solids.
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Affiliation(s)
- Jonathan W Steed
- Department of Chemistry, Durham University, Science Site, South Road, Durham DH1 3LE, UK.
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18
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Tilborg A, Springuel G, Norberg B, Wouters J, Leyssens T. On the influence of using a zwitterionic coformer for cocrystallization: structural focus on naproxen–proline cocrystals. CrystEngComm 2013. [DOI: 10.1039/c3ce40084k] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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19
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Sander JRG, Bučar DK, Henry RF, Giangiorgi BN, Zhang GGZ, MacGillivray LR. ‘Masked synthons’ in crystal engineering: insulated components in acetaminophen cocrystal hydrates. CrystEngComm 2013. [DOI: 10.1039/c3ce40159f] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Abramov YA, Loschen C, Klamt A. Rational coformer or solvent selection for pharmaceutical cocrystallization or desolvation. J Pharm Sci 2012; 101:3687-97. [PMID: 22821740 DOI: 10.1002/jps.23227] [Citation(s) in RCA: 121] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 05/02/2012] [Accepted: 05/16/2012] [Indexed: 11/09/2022]
Abstract
It is demonstrated that the fluid-phase thermodynamics theory conductor-like screening model for real solvents (COSMO-RS) as implemented in the COSMOtherm software can be used for accurate and efficient screening of coformers for active pharmaceutical ingredient (API) cocrystallization. The excess enthalpy, H(ex) , between an API-coformer mixture relative to the pure components reflects the tendency of those two compounds to cocrystallize. Thus, predictive calculations may be performed with decent effort on a large set of molecular data in order to identify potentially new cocrystal systems. In addition, it is demonstrated that COSMO-RS theory allows reasonable ranking of coformers for API solubility improvement. As a result, experiments may be focused on those coformers, which have an increased probability of cocrystallization, leading to the largest improvement of the API solubility. In a similar way as potential coformers are identified for cocrystallization, solvents that do not tend to form solvates may be determined based on the highest H(ex) s with the API. The approach was successfully tested on tyrosine kinase inhibitor axitinib, which has a propensity to form relatively stable solvated structures with the majority of common solvents, as well as on thiophanate-methyl and thiophanate-ethyl benzimidazole fungicides, which form channel solvates.
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Affiliation(s)
- Yuriy A Abramov
- Pfizer Global Research and Development, Groton, Connecticut, USA.
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21
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André V, M. da Piedade MF, Duarte MT. Revisiting paracetamol in a quest for new co-crystals. CrystEngComm 2012. [DOI: 10.1039/c2ce25307k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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