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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.


Parasuraman Rajasekaran, David Crich. Synthesis of Gentamicin Minor Components: Gentamicin B1 and Gentamicin X2. Organic letters. 2020 May 15;22(10):3850-3854

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PMID: 32343899

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