Disodium salts, monohydrate, and ethanol solvates

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 229/00 (2006.01) A61K 47/18 (2006.01) C07C 235/60 (2006.01) A61K 9/20 (2006.01)

Patent

CA 2369591

The inventors have discovered that the disodium salt of certain delivery agents has surprisingly greater efficacy for delivering active agents than the corresponding monosodium salt. Furthermore, the inventors have discovered that the disodium salts of these delivery agents form solvates with ethanol and hydrates with water. The delivery agents have formula (I) wherein R1, R2, R3, and R4 are indepedently hydrogen, halogen, C1-C4 alkyl, or C1-C4 alkoxy; and R5 is a substituted or unsubstituted C2-C16 alkylene, substituted or unsubstituted C2-C16 alkenylene, substituted or unsubstituted C1-C12 alkyl(arylene), or substituted or unsubstituted aryl(C1-C12 alkylene). The hydrates and solvates of present invention also have surprisingly greater efficacy for delivering active agents, such as heparin and calcitonin, than their corresponding monosodium salts and free acids. The present invention provides an alcohol solvate, such as ethanol solvate, of a disodium salt of a delivery agent of formula (I) above. Preferred delivery agents include, but are not limited to, N-(5-chlorosalicyloyl)-8-aminocaprylic acid (5-CNAC),N-(10- [2-hydroxybenzoyl]amino)decanoic acid (SNAD), and sodium N-(8-[2- hydroxybenzoyl]amino)caprylate (SNAC). The invention also provides methods of preparing the disodium salt, ethanol solvate, and hydrate and compositions containing the disodium salt, ethanol solvate, and/or hydrate.

Selon l'invention, le sel disodique de certains agents d'administration présentent une efficacité étonnement plus grande pour libérer des agents actifs que les sels monosodiques correspondants. De plus, les sels disodiques de ces agents d'administration forment des solvates avec l'éthanol et des hydrates avec l'eau. La formule des agents d'administration est la suivante. R?1¿,R?2¿, R?3¿ et R?4¿ représentent chacun indépendamment hydrogène, halogène, C¿1?-C¿4? alkyle, ou C¿1?-C¿4? alcoxy; et R?5¿ est un C¿2?-C¿16? alkylène substitué ou non substitué, C¿2?-C¿16? alkénylène substitué ou non substitué, C¿1?-C¿12? alkyl(arylène) substitué ou non substitué, ou aryle(C¿1?-C¿12? alkylène) substitué ou non substitué. Les hydrates et les solvates, selon l'invention, présentent aussi une efficacité étonnamment plus grande pour libérer des agents actifs, par exemple l'héparine et la calcitonine, que les sels monosodiques et acides libres correspondants. L'invention concerne également un solvate d'alcool, tel que le solvate d'éthanol, d'un sel disodique d'un agent d'administration de la formule ci-dessus. Les agents d'administration préférés sont notamment N-(5-chlorosalicyloyle)-8-acide aminocaprylique (5-CNAC),N-(10-[2-hydroxybenzoyle]amino)acide décanoïque (SNAD), et N-8-[2-hydroxybenzoyle]amino)caprylate (SNAC) de sodium. Sont également traités, des procédés de préparation de sel disodique, de solvate d'éthanol, d'hydrate, ainsi que des compositions contenant du sel disodique, du solvate d'éthanol et/ou d'hydrate.

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