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Soluble cocrystals of the xanthine oxidase inhibitor febuxostat

机译:黄嘌呤氧化酶抑制剂非布索坦的可溶性共晶体

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摘要

The synthesis and physicochemical characterization of febuxostat (FEB) cocrystals, a xanthine oxidase inhibitor, with pharmaceutically acceptable coformers, such as urea (URE), acetamide (ACT), nicotinamide (NIC), p-aminobenzoic acid (PABA), and saccharin (SAC) (all of 1:1 stoichiometry), are reported. X-ray crystal structures were determined for FEB drug and its cocrystals with URE, ACT, NIC, and PABA, whereas the SAC cocrystal was characterized by FT-IR-Raman, differential scanning calorimetry (DSC), ~(13)C ss-NMR, and powder X-ray diffraction. The crystal structure of FEB has O-H?N hydrogen bonds (COOH?N? -C) instead of the expected acid-acid homodimer synthon. The cocrystal structures are sustained by the cyclic synthons acid-amide (FEB-URE, FEB-NIC) and acid-acid (FEB-PABA), while FEB-ACT has no distinct ring motif. The cocrystals exhibited a higher intrinsic dissolution rate (IDR) compared to FEB and good stability in accelerated ICH humidity conditions of 75% RH at 40 C.
机译:黄嘌呤氧化酶抑制剂非布索坦(FEB)共晶体与药学上可接受的共形成物如尿素(URE),乙酰胺(ACT),烟酰胺(NIC),对氨基苯甲酸(PABA)和糖精( SAC)(均为1:1的化学计量比)。确定了FEB药物及其与URE,ACT,NIC和PABA的共晶体的X射线晶体结构,而SAC共晶体的特征在于FT-IR-拉曼光谱,差示扫描量热法(DSC),〜(13)C ss- NMR和粉末X射线衍射。 FEB的晶体结构具有O-H→N氢键(COOH→N→C),而不是预期的酸-酸均二聚体合成子。共晶体结构由环状合成子酸酰胺(FEB-URE,FEB-NIC)和酸-酸(FEB-PABA)维持,而FEB-ACT没有明显的环基序。与FEB相比,共晶体表现出更高的固有溶解速率(IDR),并且在40°C下在75%RH的加速ICH湿度条件下具有良好的稳定性。

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