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New Co-Crystals/Salts of Gallic Acid and Substituted Pyridines: An Effect of Ortho-Substituents on the Formation of an Acid–Pyridine Heterosynthon. CRYSTALS 2022. [DOI: 10.3390/cryst12040497] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Co-crystallization of gallic acid with pyridines and their polyaromatic analogue, quinoline, ortho-substituted by various proton-donating groups able to form hydrogen bonds, produced the only reported co-crystal of gallic acid with an ortho-substituted pyridine, 2-hydroxypyridine, as its preferred pyridone-2 tautomer, and four new crystalline products of gallic acid. These co-crystals, or gallate salts depending on the choice of the pyridine-containing compound, as predicted by the pKa rule, were identified by X-ray diffraction to feature the popular acid–pyridine heterosynthon found in most of the two-component systems of gallic acid that lack ortho-substituents in the pyridine-containing compound. This single-point heterosynthon is, however, modified by one or two proton-donating ortho-substituents, which sometimes may transform into the proton acceptors in an adopted tautomer or zwitterion, to produce its two- or other multi-point variants, including a very rare four-point heterosynthon. The hydrogen bonds they form with the gallic acid species in the appropriate co-crystals/salts strongly favors the formation of the acid–pyridine heterosynthon over the acid–acid homosynthon. In the competitive conditions of multi-component systems, such a modification might be used to reduce supramolecular-synthon-based polymorphism to produce new pharmaceuticals and other crystalline materials with designed properties.
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Guo J, Zhang Y, Jin S, Ye X, Hu K, Xu W, Wang D. Syntheses and structural characterization of eight inorganic-organic hybrid solids based on N-Brønsted bases and halometallates of Zn, Cu, Sb and Bi. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1897137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Jiahua Guo
- Jiyang college, Zhejiang A & F University, Zhu'ji, Zhejiang Province, China
- Key Laboratory of Chemical Utilization of Forestry Biomass of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
| | - Yuqi Zhang
- Jiyang college, Zhejiang A & F University, Zhu'ji, Zhejiang Province, China
- Key Laboratory of Chemical Utilization of Forestry Biomass of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
| | - Shouwen Jin
- Jiyang college, Zhejiang A & F University, Zhu'ji, Zhejiang Province, China
- Key Laboratory of Chemical Utilization of Forestry Biomass of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
| | - Xiaoyun Ye
- Jiyang college, Zhejiang A & F University, Zhu'ji, Zhejiang Province, China
- Key Laboratory of Chemical Utilization of Forestry Biomass of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
| | - Kaikai Hu
- Jiyang college, Zhejiang A & F University, Zhu'ji, Zhejiang Province, China
- Key Laboratory of Chemical Utilization of Forestry Biomass of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
| | - Weiqiang Xu
- Jiyang college, Zhejiang A & F University, Zhu'ji, Zhejiang Province, China
- Key Laboratory of Chemical Utilization of Forestry Biomass of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
| | - Daqi Wang
- Department of Chemical Engineering, Liaocheng University, Liaocheng, Shandong, China
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Fang W, Chen B, Chen D, Wang S, Yan Y, Jin S, Xu W, Wang D. Seven supramolecular adducts of 4-dimethylaminopyridine and carboxylic acids constructed by classical H-Bonds and some noncovalent interactions. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127353] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Structural, spectral, physiochemical, computational studies and pharmacological screening of a new organic salt: 2, 6-diaminopyridinium-2-nitrobenzoate. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Durán-Palma MH, Mendoza-Barraza SS, Magaña-Vergara NE, Martínez-Martínez FJ, González-González JS. Crystal structure of pharmaceutical cocrystals of 2,6-diaminopyridine with piracetam and theophylline. Acta Crystallogr C Struct Chem 2017; 73:767-772. [PMID: 28978781 DOI: 10.1107/s205322961701230x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 08/24/2017] [Indexed: 11/10/2022] Open
Abstract
Pharmaceutical cocrystals are crystalline solids formed by an active pharmaceutical ingredient and a cocrystal former. The cocrystals 2,6-diaminopyridine (DAP)-piracetam [PIR; systematic name: 2-(2-oxopyrrolidin-1-yl)acetamide] (1/1), C5H7N3·C6H10N2O2, (I), and 2,6-diaminopyridine-theophylline (TEO; systematic name: 1,3-dimethyl-7H-purine-2,6-dione) (1/1), C5H7N3·C7H8N4O2, (II), were prepared by the solvent-assisted grinding method and were characterized by IR spectroscopy and powder X-ray diffraction. Cocrystal (I) crystallized in the orthorhombic space group Pbca and showed a 1:1 stoichiometry. The DAP and PIR molecules are linked by an N-H...O hydrogen-bond interaction. Self-assembly of PIR molecules forms a sheet of C(4) and C(7) chains. Cocrystal (II) crystallized in the monoclinic P21/c space group and also showed a 1:1 stoichiometry. The DAP and TEO molecules are connected by N-H...N and N-H...O hydrogen bonds, forming an R22(9) heterosynthon. A bidimensional supramolecular array is formed by interlinked DAP-TEO tetramers, producing a two-dimensional sheet.
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Affiliation(s)
- Melissa Hidekel Durán-Palma
- Instituto de Farmacobiología, Universidad de la Cañada, Carretera Teotitlán-San Antonio Nanahuatipan km 1.7 s/n, Teotitlán de Flores Magón, Oaxaca 68540, Mexico
| | - Sonia Sanet Mendoza-Barraza
- Facultad de Ciencias Químicas, Universidad de Colima, km 9 Carretera Colima-Coquimatlán, Coquimatlán, Colima 28400, Mexico
| | - Nancy Evelyn Magaña-Vergara
- Facultad de Ciencias Químicas, Universidad de Colima, km 9 Carretera Colima-Coquimatlán, Coquimatlán, Colima 28400, Mexico
| | | | - Juan Saulo González-González
- Instituto de Farmacobiología, Universidad de la Cañada, Carretera Teotitlán-San Antonio Nanahuatipan km 1.7 s/n, Teotitlán de Flores Magón, Oaxaca 68540, Mexico
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Synthesis, Structures, and Catalytic Properties of Two Zinc(II) Coordination Polymers Constructed from Polycarboxylate and Bis(Benzimidazole) Ligands. J Inorg Organomet Polym Mater 2016. [DOI: 10.1007/s10904-016-0339-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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