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Wang C, Ma CY, Hong RS, Turner TD, Rosbottom I, Sheikh AY, Yin Q, Roberts KJ. Influence of Solvent Selection on the Crystallizability and Polymorphic Selectivity Associated with the Formation of the "Disappeared" Form I Polymorph of Ritonavir. Mol Pharm 2024; 21:3525-3539. [PMID: 38900600 PMCID: PMC11220793 DOI: 10.1021/acs.molpharmaceut.4c00234] [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: 03/04/2024] [Revised: 06/01/2024] [Accepted: 06/03/2024] [Indexed: 06/22/2024]
Abstract
The comparative crystallizability and polymorphic selectivity of ritonavir, a novel protease inhibitor for the treatment of acquired immune-deficiency syndrome, as a function of solvent selection are examined through an integrated and self-consistent experimental and computational molecular modeling study. Recrystallization at high supersaturation by rapid cooling at 283.15 K is found to produce the metastable "disappeared" polymorphic form I from acetone, ethyl acetate, acetonitrile, and toluene solutions in contrast to ethanol which produces the stable form II. Concomitant crystallization of the other known solid forms is not found under these conditions. Isothermal crystallization studies using turbidometric detection based upon classical nucleation theory reveal that, for an equal induction time, the required driving force needed to initiate solution nucleation decreases with solubility in the order of ethanol, acetone, acetonitrile, ethyl acetate, and toluene consistent with the expected desolvation behavior predicted from the calculated solute solvation free energies. Molecular dynamics simulations of the molecular and intermolecular chemistry reveal the presence of conformational interplay between intramolecular and intermolecular interactions within the solution phase. These encompass the solvent-dependent formation of intramolecular O-H...O hydrogen bonding between the hydroxyl and carbamate groups coupled with differing conformations of the hydroxyl's shielding phenyl groups. These conformational preferences and their relative interaction propensities, as a function of solvent selection, may play a rate-limiting role in the crystallization behavior by not only inhibiting to different degrees the nucleation process but also restricting the assembly of the optimal intermolecular hydrogen bonding network needed for the formation of the stable form II polymorph.
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Affiliation(s)
- Chang Wang
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
- School
of Chemical Engineering and Technology, State Key Laboratory of Chemical
Engineering, Tianjin University, Tianjin 300072, China
| | - Cai Y. Ma
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
| | - Richard S. Hong
- Molecular
Profiling and Drug Delivery, Research and Development, AbbVie Inc, North Chicago, Illinois 60064, United States
| | - Thomas D. Turner
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
| | - Ian Rosbottom
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
| | - Ahmad Y. Sheikh
- Molecular
Profiling and Drug Delivery, Research and Development, AbbVie Inc, North Chicago, Illinois 60064, United States
| | - Qiuxiang Yin
- School
of Chemical Engineering and Technology, State Key Laboratory of Chemical
Engineering, Tianjin University, Tianjin 300072, China
| | - Kevin J. Roberts
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
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Liu Y, Ma CY, Gong J, Roberts KJ. The Influence of Solvent Selection upon the Crystallizability and Nucleation Kinetics of Tolfenamic Acid Form II. CRYSTAL GROWTH & DESIGN 2023; 23:5846-5859. [PMID: 37547878 PMCID: PMC10401637 DOI: 10.1021/acs.cgd.3c00450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/20/2023] [Indexed: 08/08/2023]
Abstract
The influence of the solution environment on the solution thermodynamics, crystallizability, and nucleation of tolfenamic acid (TFA) in five different solvents (isopropanol, ethanol, methanol, toluene, and acetonitrile) is examined using an integrated workflow encompassing both experimental studies and intermolecular modeling. The solubility of TFA in isopropanol is found to be the highest, consistent with the strongest solvent-solute interactions, and a concomitantly higher than ideal solubility. The crystallizability is found to be highly dependent on the solvent type with the overall order being isopropanol < ethanol < methanol < toluene < acetonitrile with the widest solution metastable zone width in isopropanol (24.49 to 47.41 °C) and the narrowest in acetonitrile (8.23 to 16.17 °C). Nucleation is found to occur via progressive mechanism in all the solvents studied. The calculated nucleation parameters reveal a considerably higher interfacial tension and larger critical nucleus radius in the isopropanol solutions, indicating the higher energy barrier hindering nucleation and hence lowering the nucleation rate. This is supported by diffusion coefficient measurements which are lowest in isopropanol, highlighting the lower molecular diffusion in the bulk of solution compared to the other solutions. The TFA concentration and critical supersaturation at the crystallization onset is found to be directly correlated with TFA/isopropanol solutions having the highest values of solubility and critical supersaturation. Intermolecular modeling of solute-solvent interactions supports the experimental observations of the solubility and crystallizability, highlighting the importance of understanding solvent selection and solution state structure at the molecular level in directing the solubility, solute mass transfer, crystallizability, and nucleation kinetics.
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Affiliation(s)
- Yu Liu
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
| | - Cai Y. Ma
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
| | - Junbo Gong
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Kevin J. Roberts
- Centre
for the Digital Design of Drug Products, School of Chemical and Process
Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
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Tyson B, Pask CM, George N, Simone E. Crystallization Behavior and Crystallographic Properties of dl-Arabinose and dl-Xylose Diastereomer Sugars. CRYSTAL GROWTH & DESIGN 2022; 22:1371-1383. [PMID: 35140548 PMCID: PMC8815043 DOI: 10.1021/acs.cgd.1c01329] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/07/2022] [Indexed: 05/12/2023]
Abstract
Natural sugar molecules such as xylose and arabinose exhibit sweetness profiles similar to sucrose, which makes them a valuable alternative in low-calorie foods as well as excipients or cocrystallization agents in pharmaceutical formulations. Xylose and arabinose are also chiral diastereomers that can exhibit specific crystallization behavior. In this work, the solid-state landscapes of the chiral pairs of both xylose and arabinose have been investigated to determine whether racemic compounds or conglomerates are formed. Furthermore, single crystals of xylose and arabinose have been grown and characterized by X-ray diffraction and optical microscopy to study their crystallographic properties and relate them to the crystallization behavior. Differential scanning calorimetry (DSC) measurements were used to determine the phase diagrams of the two analyzed chiral systems. The solubilities of the different solid forms of xylose and arabinose were measured in different solvent mixtures by a thermogravimetric method. An analysis was conducted to assess the main thermodynamic parameters and the activity coefficients of the compounds in solution. Finally, slurry experiments in a 50:50 w/w ethanol/water solvent have also been performed to determine the relative stability of each solid form and the kinetics of transformation in this solvent mixture. It was found that dl-arabinose crystallizes as a stable racemic compound, which transforms quickly from its constituent enantiomers when in solution; whereas d- and l-xylose molecules crystallize separately as a conglomerate.
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Affiliation(s)
- Bradley Tyson
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United Kingdom
| | | | - Neil George
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, United Kingdom
- Syngenta
Jealotts Hill Int. Research Centre, Bracknell, Berkshire RG42
6EY, United Kingdom
| | - Elena Simone
- School
of Food Science and Nutrition, Food Colloids and Bioprocessing Group, University of Leeds, Leeds LS2 9JT, United Kingdom
- Department
of Applied Science and Technology (DISAT), Politecnico di Torino, 10129 Torino, Italy
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Computational study of metformin hydrochloride nucleation in hydroxylic solvents: Experimental kinetics and DFT simulation. Int J Pharm 2022; 616:121517. [DOI: 10.1016/j.ijpharm.2022.121517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/05/2022] [Accepted: 01/22/2022] [Indexed: 11/23/2022]
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