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Bilal A, Mehmood A, Noureen S, Lecomte C, Ahmed M. Crystal engineering of a co-crystal of antipyrine and 2-chlorobenzoic acid: relative energetic contributions based on multipolar refinement. CrystEngComm 2022. [DOI: 10.1039/d2ce01179d] [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
The growth and stability of a new 1 : 1 antipyrene–dichlorobenzoic acid cocrystal system has been analyzed in terms of electron density analysis and electrostatic interaction energy contributions.
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Affiliation(s)
- Aqsa Bilal
- Materials Chemistry Laboratory, Institute of Chemistry, The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus, 63100, Pakistan
| | - Arshad Mehmood
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas, 76129, USA
| | - Sajida Noureen
- Materials Chemistry Laboratory, Institute of Chemistry, The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus, 63100, Pakistan
| | - Claude Lecomte
- Laboratoire CRM2, UMR CNRS 7036, Université de Lorraine, Boulevard des Aiguillettes BP70239, Vandoeuvre-les-Nancy, 54506, France
- CNRS, Laboratoire CRM2, UMR CNRS 7036, Boulevard des Aiguillettes, BP70239, Vandoeuvre-les-Nancy, 54506, France
| | - Maqsood Ahmed
- Materials Chemistry Laboratory, Institute of Chemistry, The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus, 63100, Pakistan
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2
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Robert C, Fraser-Miller SJ, Be Rziņš KR, Okeyo PO, Rantanen J, Rades T, Gordon KC. Monitoring the Isothermal Dehydration of Crystalline Hydrates Using Low-Frequency Raman Spectroscopy. Mol Pharm 2021; 18:1264-1276. [PMID: 33406363 DOI: 10.1021/acs.molpharmaceut.0c01126] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Detection of the solid-state forms of pharmaceutical compounds is important from the drug performance point of view. Low-frequency Raman (LFR) spectroscopy has been demonstrated to be very sensitive in detecting the different solid-state forms of pharmaceutically relevant compounds. The potential of LFR spectroscopy to probe the in situ isothermal dehydration was studied using piroxicam monohydrate (PXM) and theophylline monohydrate (TPMH) as the model drugs. The dehydration of PXM and TPMH at four different temperatures (95, 100, 105, and 110 °C and 50, 60, 70, and 80 °C, respectively) was monitored in both the low- (20-300 cm-1) and mid-frequency (335-1800 cm-1) regions of the Raman spectra. Principal component analysis and multivariate curve resolution were applied for the analysis of the Raman data. Spectral differences observed in both regions highlighted the formation of specific anhydrous forms of piroxicam and theophylline from their respective monohydrates. The formation of the anhydrous forms was detected on different timescales (approx. 2 min) between the low and mid-frequency Raman regions. This finding highlights the differing nature of the vibrations being detected between these two spectral regions. Computational simulations performed were also in agreement with the experimental results, and allowed elucidating the origin of different spectral features.
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Affiliation(s)
- Chima Robert
- Dodd Walls Centre for Photonics and Quantum Technologies, University of Otago, 9016 Dunedin, New Zealand
| | - Sara J Fraser-Miller
- Dodd Walls Centre for Photonics and Quantum Technologies, University of Otago, 9016 Dunedin, New Zealand
| | - Ka Rlis Be Rziņš
- Dodd Walls Centre for Photonics and Quantum Technologies, University of Otago, 9016 Dunedin, New Zealand
| | - Peter O Okeyo
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.,The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Ørsted Plads, 2800 Kgs Lyngby, Denmark
| | - Jukka Rantanen
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Keith C Gordon
- Dodd Walls Centre for Photonics and Quantum Technologies, University of Otago, 9016 Dunedin, New Zealand
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Liu X, Michalchuk AAL, Pulham CR, Boldyreva EV. An acetonitrile-solvated cocrystal of piroxicam and succinic acid with co-existing zwitterionic and non-ionized piroxicam molecules. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2019; 75:29-37. [PMID: 30601128 DOI: 10.1107/s2053229618016911] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 11/28/2018] [Indexed: 11/10/2022]
Abstract
This work reports a new acetonitrile (ACN)-solvated cocrystal of piroxicam (PRX) and succinic acid (SA), 2C15H13N3O4S·0.5C4H6O4·C2H3N or PRX:SA:ACN (4:1:2), which adopts the triclinic space group P-1. The outcome of crystallization from ACN solution can be controlled by varying only the PRX:SA ratio, with a higher PRX:SA ratio in solution unexpectedly favouring a lower stoichiometric ratio in the solid product. In the new solvate, zwitterionic (Z) and non-ionized (NI) PRX molecules co-exist in the asymmetric unit. In contrast, the nonsolvated PRX-SA cocrystal contains only NI-type PRX molecules. The ACN molecule entrapped in PRX-SA·ACN does not form any hydrogen bonds with the surrounding molecules. In the solvated cocrystal, Z-type molecules form dimers linked by intermolecular N-H...O hydrogen bonds, whereas every pair of NI-type molecules is linked to SA via N-H...O and O-H...N hydrogen bonds. Thermogravimetry and differential scanning calorimetry suggest that thermal desolvation of the solvate sample occurs at 148 °C, and is followed by recrystallization, presumably of a multicomponent PRX-SA structure. Vibrational spectra (IR and Raman spectroscopy) of PRX-SA·ACN and PRX-SA are also used to demonstrate the ability of spectroscopic techniques to distinguish between NI- and Z-type PRX molecules in the solid state. Hence, vibrational spectroscopy can be used to distinguish the PRX-SA cocrystal and its ACN solvate.
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Affiliation(s)
- Xiaojiao Liu
- EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, University of Edinburgh, Joseph Black Building, Edinburgh EH9 3FJ, Scotland
| | - Adam A L Michalchuk
- EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, University of Edinburgh, Joseph Black Building, Edinburgh EH9 3FJ, Scotland
| | - Colin R Pulham
- EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, University of Edinburgh, Joseph Black Building, Edinburgh EH9 3FJ, Scotland
| | - Elena V Boldyreva
- Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, pr. Lavrentieva 5, Novosibirisk 630090, Russian Federation
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Kita Y, Yata T, Nishimoto Y, Chiba K, Yasuda M. Selective oxymetalation of terminal alkynes via 6- endo cyclization: mechanistic investigation and application to the efficient synthesis of 4-substituted isocoumarins. Chem Sci 2018; 9:6041-6052. [PMID: 30079217 PMCID: PMC6053900 DOI: 10.1039/c8sc01537f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 06/13/2018] [Indexed: 01/05/2023] Open
Abstract
The cyclization of heteroatom-containing alkynes with π acidic metal salts is an attractive method to prepare heterocycles because the starting materials are readily available and the organometallic compounds are useful synthetic intermediates. A new organometallic species in the heterocyclization provides an opportunity to synthesize heterocycles that are difficult to obtain. Herein, we describe a novel cyclic oxymetalation of 2-alkynylbenzoate with indium or gallium salts that proceeds with an unusual regioselectivity to give isocoumarins bearing a carbon-metal bond at the 4-position. This new type of metalated isocoumarin provided 3-unsubstituted isocoumarins that have seldom been investigated despite their important pharmacological properties. Indium and gallium salts showed high performance in the selective 6-endo cyclization of terminal alkynes while boron or other metals such as Al, Au, and Ag caused 5-exo cyclization or decomposition of terminal alkynes, respectively. The metalated isocoumarin and its reaction intermediate were unambiguously identified by X-ray crystallographic analysis. The theoretical calculation of potential energy profiles showed that oxyindation could proceed via 6-endo cyclization under thermodynamic control while previously reported oxyboration would give a 5-membered ring under kinetic control. The investigation of electrostatic potential maps suggested that the differences in the atomic characters of indium, boron and their ligands would contribute to such a regioselective switch. The metalated isocoumarins were applied to organic synthetic reactions. The halogenation of metalated isocoumarins proceeded to afford 4-halogenated isocoumarins bearing various functional groups. The palladium-catalyzed cross coupling of organometallic species with organic halides gave various 4-substituted isocoumarins. A formal total synthesis of oosponol, which exhibits strong antifungal activity, was accomplished.
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Affiliation(s)
- Yuji Kita
- Department of Applied Chemistry , Graduate School of Engineering , Osaka University , 2-1 Yamadaoka, Suita , Osaka 565-0871 , Japan .
| | - Tetsuji Yata
- Department of Applied Chemistry , Graduate School of Engineering , Osaka University , 2-1 Yamadaoka, Suita , Osaka 565-0871 , Japan .
| | - Yoshihiro Nishimoto
- Frontier Research Base for Global Young Researchers Center for Open Innovation Research and Education (COiRE) , Graduate School of Engineering , Osaka University , 2-1 Yamadaoka, Suita , Osaka 565-0871 , Japan .
| | - Kouji Chiba
- Material Science Division , MOLSIS Inc. , 1-28-38 Shinkawa, Chuo-ku , Tokyo 104-0033 , Japan
| | - Makoto Yasuda
- Department of Applied Chemistry , Graduate School of Engineering , Osaka University , 2-1 Yamadaoka, Suita , Osaka 565-0871 , Japan .
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Lipiäinen T, Pessi J, Movahedi P, Koivistoinen J, Kurki L, Tenhunen M, Yliruusi J, Juppo AM, Heikkonen J, Pahikkala T, Strachan CJ. Time-Gated Raman Spectroscopy for Quantitative Determination of Solid-State Forms of Fluorescent Pharmaceuticals. Anal Chem 2018; 90:4832-4839. [PMID: 29513001 PMCID: PMC6150637 DOI: 10.1021/acs.analchem.8b00298] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 03/07/2018] [Indexed: 11/29/2022]
Abstract
Raman spectroscopy is widely used for quantitative pharmaceutical analysis, but a common obstacle to its use is sample fluorescence masking the Raman signal. Time-gating provides an instrument-based method for rejecting fluorescence through temporal resolution of the spectral signal and allows Raman spectra of fluorescent materials to be obtained. An additional practical advantage is that analysis is possible in ambient lighting. This study assesses the efficacy of time-gated Raman spectroscopy for the quantitative measurement of fluorescent pharmaceuticals. Time-gated Raman spectroscopy with a 128 × (2) × 4 CMOS SPAD detector was applied for quantitative analysis of ternary mixtures of solid-state forms of the model drug, piroxicam (PRX). Partial least-squares (PLS) regression allowed quantification, with Raman-active time domain selection (based on visual inspection) improving performance. Model performance was further improved by using kernel-based regularized least-squares (RLS) regression with greedy feature selection in which the data use in both the Raman shift and time dimensions was statistically optimized. Overall, time-gated Raman spectroscopy, especially with optimized data analysis in both the spectral and time dimensions, shows potential for sensitive and relatively routine quantitative analysis of photoluminescent pharmaceuticals during drug development and manufacturing.
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Affiliation(s)
- Tiina Lipiäinen
- Division of Pharmaceutical
Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland
| | - Jenni Pessi
- Division of Pharmaceutical
Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland
| | - Parisa Movahedi
- Department of Future
Technologies, University of Turku, Vesilinnantie 5, FI-20500 Turku, Finland
| | - Juha Koivistoinen
- Nanoscience Center, Department of Chemistry, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland
| | - Lauri Kurki
- TimeGate Instruments, Teknologiantie 5, FI-90590 Oulu, Finland
| | - Mari Tenhunen
- TimeGate Instruments, Teknologiantie 5, FI-90590 Oulu, Finland
| | - Jouko Yliruusi
- Division of Pharmaceutical
Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland
| | - Anne M. Juppo
- Division of Pharmaceutical
Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland
| | - Jukka Heikkonen
- Department of Future
Technologies, University of Turku, Vesilinnantie 5, FI-20500 Turku, Finland
| | - Tapio Pahikkala
- Department of Future
Technologies, University of Turku, Vesilinnantie 5, FI-20500 Turku, Finland
| | - Clare J. Strachan
- Division of Pharmaceutical
Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland
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6
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Lipiäinen T, Fraser-Miller SJ, Gordon KC, Strachan CJ. Direct comparison of low- and mid-frequency Raman spectroscopy for quantitative solid-state pharmaceutical analysis. J Pharm Biomed Anal 2018; 149:343-350. [DOI: 10.1016/j.jpba.2017.11.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/27/2017] [Accepted: 11/01/2017] [Indexed: 10/18/2022]
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Beaud R, Nandi RK, Perez-Luna A, Guillot R, Gori D, Kouklovsky C, Ghermani NE, Gandon V, Vincent G. Revealing the electrophilicity of N-Ac indoles with FeCl3: a mechanistic study. Chem Commun (Camb) 2017; 53:5834-5837. [DOI: 10.1039/c7cc02756g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The puzzling hydroarylation of N-Ac indoles promoted by iron trichloride involves a doubly activated intermediate: as supported by the electron density topology of a crystal, IR monitoring, and DFT calculations.
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Affiliation(s)
- Rodolphe Beaud
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
- Univ. Paris-Sud
- Université Paris-Saclay
- CNRS UMR 8182
- 91405 Orsay cedex
| | - Raj Kumar Nandi
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
- Univ. Paris-Sud
- Université Paris-Saclay
- CNRS UMR 8182
- 91405 Orsay cedex
| | - Alejandro Perez-Luna
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- FR 2769
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
- Univ. Paris-Sud
- Université Paris-Saclay
- CNRS UMR 8182
- 91405 Orsay cedex
| | - Didier Gori
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
- Univ. Paris-Sud
- Université Paris-Saclay
- CNRS UMR 8182
- 91405 Orsay cedex
| | - Cyrille Kouklovsky
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
- Univ. Paris-Sud
- Université Paris-Saclay
- CNRS UMR 8182
- 91405 Orsay cedex
| | - Nour-Eddine Ghermani
- Laboratoire Structures
- Propriétés et Modélisation des Solides
- Université Paris Saclay
- Centrale Supélec
- CNRS
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
- Univ. Paris-Sud
- Université Paris-Saclay
- CNRS UMR 8182
- 91405 Orsay cedex
| | - Guillaume Vincent
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
- Univ. Paris-Sud
- Université Paris-Saclay
- CNRS UMR 8182
- 91405 Orsay cedex
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