Recommanded Product: Picolinamide. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about New Pharmaceutical Cocrystal Forms of Flurbiprofen: Structural, Physicochemical, and Thermodynamic Characterization. Author is Surov, Artem O.; Manin, Alex N.; Voronin, Alexander P.; Boycov, Denis E.; Magdysyuk, Oxana V.; Perlovich, German L..
In this work, three new cocrystals of the nonsteroidal anti-inflammatory drug flurbiprofen with salicylamide, benzamide, and picolinamide have been discovered using thermodn. anal. of solid-liquid binary phase diagrams, and their crystal structures have been determined from the high-resolution synchrotron powder diffraction data. Periodic d. functional theory calculations have been carried out to gain addnl. insight into energy differences between the cocrystal structures. The pH-solubility behavior and solubility advantage of the cocrystals have been examined via eutectic concentrations of the components, and the thermodn. stability relationships between different solid phases have been rationalized in terms of Gibbs energies of the formation reactions. In addition, a new model has been proposed for estimating the solubility product (Ksp) of a cocrystal, based on the exptl. intrinsic solubility of the drug and coformer complemented by calculated physicochem. HYBOT descriptors. The relationship between the change in Gibbs free energy and the mol. volume of cocrystal formation has been observed and discussed.
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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem