# US 9,751,907 B2 · Arbekacin derivative, and production and use thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,907 B2 - Document ID: US9751907B2 - Status: Granted - Kind: B2 - Application number: 14/891,838 - Filed: 2014-05-29 - Published: 2016-04-07 - Granted: 2017-09-05 - Earliest claimed: 2013-05-30 - Assignees: Meiji Seika Pharma Co., Ltd. - Applicants: Meiji Seika Pharma Co., Ltd. - Inventors: Hiroyasu Miwa; Hisashi Kishi; Toshiro Sasaki; Takashi Murata; Makoto Oyama; Nao Sano; Ayako Odagiri - Web page: https://patentgrep.com/patent/US9751907B2 ## CPC - C07H 15/234: attached to non-adjacent ring carbon atoms of the cyclohexane rings, e.g. kanamycins, tobramycin, nebramycin, gentamicin A2 - A61P 11/00: Drugs for disorders of the respiratory system - A61P 31/04: Antibacterial agents - C07H: SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS (derivatives of aldonic or saccharic acids C07C, C07D; aldonic acids, saccharic acids C07C59/105, C07C59/285; cyanohydrins C07C255/16; glycals C07D; compounds of unknown constitution C07G; polysaccharides, derivatives thereof C08B; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification C12N15/00; sugar industry C13) - A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS ## Abstract It has been found that adding carbon dioxide or the like to a solution containing arbekacin free base makes it possible to produce arbekacin derivatives including arbekacin carbonate and carbamic acid of arbekacin. Moreover, it has been found that the arbekacin derivatives have a high stability, and that the use thereof enables efficient productions of highly-pure arbekacin free base and pharmaceutically acceptable salt thereof. ## Claims ### Claim 1 A production method for a carbamic acid derivative of arbekacin represented by the following formula (2): in the formula, at least one of R1, R2, R3, and R4 is COOH, while the rest represent H and including arbekacin carbonate represented by the following formula (1): in the formula, x represents 1 to 5, the production method comprising: (a) a step of adding any one of carbon dioxide, a carbonate, and a hydrogen carbonate to a solution containing arbekacin free base, thereby preparing a solution containing a carbamic acid derivative of arbekacin including arbekacin carbonate; (b) a step of precipitating the carbamic acid derivative of arbekacin including arbekacin carbonate in the solution; and (c) a step of separating the precipitated carbamic acid derivative of arbekacin including arbekacin carbonate. ### Claim 2 (depends on 1) The production method according to claim 1, wherein, in the step (a), carbon dioxide is added to the solution containing arbekacin free base to make a pH from 6.1 to 10.5, thereby preparing the solution containing the carbamic acid derivative of arbekacin including arbekacin carbonate. ### Claim 3 (depends on 1) The production method according to claim 1, wherein, in the step (a), any one of a carbonate and a hydrogen carbonate in an amount of 0.5 equivalents or more is added to the solution containing arbekacin free base, thereby preparing the solution containing the carbamic acid derivative of arbekacin including arbekacin carbonate. ### Claim 4 (depends on 1) The production method according to claim 1, wherein, in the step (b), the solution prepared in the step (a) is mixed with an organic solvent, thereby precipitating the carbamic acid derivative of arbekacin including arbekacin carbonate. ### Claim 5 (depends on 4) The production method according to claim 4, wherein the organic solvent used in the step (b) is selected from the group consisting of methanol, ethanol, propanol, dimethyl sulfoxide, acetonitrile, pyridine, tetrahydrofuran, acetone, N,N-dimethylformamide, and solvent combinations thereof. ### Claim 6 (depends on 1) A carbamic acid derivative of arbekacin including arbekacin carbonate, produced by the method according to claim 1. ### Claim 7 A production method for arbekacin free base, the production method comprising: (a) a step of adding any one of carbon dioxide, a carbonate, and a hydrogen carbonate to a solution containing arbekacin free base, thereby preparing a solution containing a carbamic acid derivative of arbekacin represented by the following formula (2): in the Formula (2), at least one of R1, R2, R3, and R4 is COOH, while the rest represent H including arbekacin carbonate represented by the following Formula (1): in the Formula (1), x represents 1 to 5; (b) a step of precipitating the carbamic acid derivative of arbekacin including arbekacin carbonate in the solution; (c) a step of separating the precipitated carbamic acid derivative of arbekacin including arbekacin carbonate; and (d) a step of removing carbon dioxide from the carbamic acid derivative of arbekacin including arbekacin carbonate obtained in the step (c). ### Claim 8 A production method for a pharmaceutically acceptable salt of arbekacin represented by the following Formula (3): in the Formula (3), y represents 1 to 5, and HA represents a pharmaceutically acceptable acid, the production method comprising: (a) a step of adding any one of carbon dioxide, a carbonate, and a hydrogen carbonate to a solution containing arbekacin free base, thereby preparing a solution containing a carbamic acid derivative of arbekacin represented by the following formula (2): in the Formula (2), at least one of R1, R2, R3, and R4 is COOH, while the rest represents H including arbekacin carbonate represented by the following Formula (1): in the Formula (1), x represents 1 to 5: (b) a step of precipitating the carbamic acid derivative of arbekacin including arbekacin carbonate in the solution; (c) a step of separating the precipitated carbamic acid derivative of arbekacin including arbekacin carbonate; and (e) a step of adding an acid to the carbamic acid derivative of arbekacin including arbekacin carbonate obtained in the step (c).