36889-17-5Relevant articles and documents
Synthesis of Gentamicin Minor Components: Gentamicin B1 and Gentamicin X2
Crich, David,Rajasekaran, Parasuraman
supporting information, p. 3850 - 3854 (2020/06/04)
The clinical aminoglycoside antibiotic gentamicin is a mixture of several difficult-to-separate major and minor components. The relative inaccessibility of the minor components in particular complicates efforts to separate antibacterial activity from nephro- and/or ototoxicity and to clarify the origin of the potentially therapeutically important read-through activity. With a view to facilitating such studies, the synthesis of a fully and selectively protected garamine-based acceptor has been developed from readily available sisomicin. Glycosylation of this acceptor with a 6-azido-6,7-dideoxy-d-glycero-d-glucoheptopyranosyl donor affords gentamicin B1 after deprotection, whereas employment of a 2-azido-2-deoxy-d-glucopyranosyl donor under N,N-dimethylformamide-directed glycosylation conditions affords gentamicin X2 after deprotection.
Delineating the biosynthesis of gentamicin X2, the common precursor of the gentamicin C antibiotic complex
Huang, Chuan,Huang, Fanglu,Moison, Eileen,Guo, Junhong,Jian, Xinyun,Duan, Xiaobo,Deng, Zixin,Leadlay, Peter F.,Sun, Yuhui
, p. 251 - 261 (2015/07/15)
Gentamicin C complex is a mixture of aminoglycoside antibiotics used worldwide to treat severe Gram-negative bacterial infections. Despite its clinical importance, the enzymology of its biosynthetic pathway has remained obscure. We report here insights into the four enzyme-catalyzed steps that lead from the first-formed pseudotrisaccharide gentamicin A2 to gentamicin X2, the last common intermediate for all components of the C complex. We have used both targeted mutations of individual genes and reconstitution of portions of the pathway in vitro to show that the secondary alcohol function at C-3″ of A2 is first converted to an amine, catalyzed by the tandem operation of oxidoreductase GenD2 and transaminase GenS2. The amine is then specifically methylated by the S-adenosyl-l-methionine (SAM)-dependent N-methyltransferase GenN to form gentamicin A. Finally, C-methylation at C-4″ to form gentamicin X2 is catalyzed by the radical SAM-dependent and cobalamin-dependent enzyme GenD1.
Bausteine von Oligosacchariden, XXI. Synthesen von Gentamicin X2 und am C-4' und C-3' modifizierter Gentamicine
Paulsen, Hans,Schroeder, Bernd,Boettcher, Henning,Hohlweg, Rolf
, p. 322 - 332 (2007/10/02)
The garamine derivative 18 can be coupled with the β-chloride 15 of 2-azido-2-deoxy-D-glucose to 20 from which, by deblocking procedure, gentamicin X2 (23) is available.In the same manner the 4'-amino- and 4'-chloro compound 24 and 25, resp., can be obtained.Coupling of 26 with 19 gives the product 27 from which the derivative 28 of gentamicin, modified at C-3', is prepared.
Garamine and derivatives thereof
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, (2008/06/13)
This disclosure relates to the preparation of garamine, its use as an antibacterial, and its use as an intermediate in the novel processes for preparing novel pseudotrisaccharides containing a garamine moiety, and to the use of the novel pseudotrisaccharides as antimicrobial, anthelmintic, antiprotozoal and antiviral agents.