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首页> 外文期刊>Crystal growth & design >Adducts of N-Heterocyclic Drugs, Niacin, Allopurinol, and Amiloride, with 2,4-Pyridinedicarboxylic Acid Coformer
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Adducts of N-Heterocyclic Drugs, Niacin, Allopurinol, and Amiloride, with 2,4-Pyridinedicarboxylic Acid Coformer

机译:用2,4-吡啶二羧酸共甲酸加合物的N-杂环药物,烟酸,Allopurinol和Amiloride

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摘要

A co-crystallization of three drug molecules, niacin (3-pyridine-carboxylic acid = NIA), allopurinol (pyrazolo(3,4-d)pyrimidin-4-one = ALP), and amiloride (3,5-diamino-6-chloro-pyrazine-2-carbonyl)-guanidine = AMI), with the same coformer, 2,4-pyridinedicarboxylic acid (FDA), resulted in three new crystalline products, (NIA)(PDA) (1), (ALP)(2)(PDA)center dot 1.5H(2)O (2), and (AMI)(2)(PDA)(2)(H2O)(2) (3). The formation of new phases was confirmed by IR spectra and X-ray single-crystal and powder diffraction analysis. The proton transfer resulted in the zwitterionic co-crystal 1. In co-crystal 2, neutral ALP molecules existed in the oxo-tautomeric form. Compound 3 crystallizes as the salt with the guanidinium cationic part as in the started amiloride hydrochloride hydrate, and the PDA coformer as the zwitterionic pyridinium dicarboxylate anion. Thus, the diversity of the PDA coformer ionization states included the neutral, zwitterion, and zwitterion anionic forms. All compounds were layered structures where the heterocyclic molecules were linked in the H-bonded corrugated layers stabilized by the diverse conventional and charge-assisted hydrogen bonds with pi-pi stacking interactions between the layers supported by the mediated water molecules in 2 and 3.
机译:三种药物分子的共结晶,烟酸(3-吡啶 - 羧酸= Nia),Allopurinol(吡唑啉(3,4-D)嘧啶-4-一= AlP)和氨基酰胺(3,5-氨基-6 -2-羰基) - 羰基=氨基= AMI),具有相同的COFORMER,2,4-吡啶二羧酸(FDA),导致三种新的晶体产品,(NIA)(PDA)(1),(ALP) (2)(PDA)中心点1.5H(2)O(2),和(AMI)(2)(PDA)(2)(2)(2)(3)。通过IR光谱和X射线单晶和粉末衍射分析确认了新相的形成。质子转移导致两性离子共晶1.在共晶2中,中性ALP分子以氧代 - 互变异构形式存在。化合物3与胍阳离子部分中的盐结晶,如在开始的盐酸盐水合物中,以及作为两性离子吡啶二羧酸甲酯阴离子的PDA Coformer。因此,PDA共焦质电离态的多样性包括中性,两性周和两性期阴离子形式。所有化合物都是层状结构,其中杂环分子在通过多样的常规和电荷辅助氢键稳定的H键合波纹层中与PI-PI堆叠在2和3中介导的水分子之间的层之间的PI-PI堆叠相互作用稳定。

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