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Stereoselective synthesis of optically active bicyclic -lactam carboxylic acids that target pilus biogenesis in pathogenic bacteria
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
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2003 (English)In: Organic & Biomolecular Chemistry, Vol. 1, 1308-14 p.Article in journal (Refereed) Published
Abstract [en]

Optically active bicyclic -lactams were synthesized, starting from 2-H-2-thiazolines and Meldrum's acid derivatives. Several methods to accomplish an ester hydrolysis without damaging the -lactam framework were investigated. A rapid CsOH saponification of the -lactam methyl esters was developed and protonation of the Cs-carboxylates by Amberlite (IR-120 H+) afforded a series of bicyclic -lactam carboxylic acids. Moreover, a convenient method for the synthesis of 2-H-2-thiazolinecarboxylic acid methyl ester 2 was developed. Bicyclic -lactam carboxylic acids 7a–g and aldehydes 4a–d were screened for their affinity to the bacterial periplasmic chaperone PapD using a surface plasmon resonance technique. -Lactams substituted with large acyl substituents showed better binding to the chaperone than the native C-terminal peptide PapG 8, demonstrating that bicyclic -lactams constitute a new class of potential bacterial chaperone inhibitors.

Place, publisher, year, edition, pages
2003. Vol. 1, 1308-14 p.
URN: urn:nbn:se:umu:diva-9967DOI: doi:10.1039/b210551aOAI: diva2:149638
Available from: 2008-06-03 Created: 2008-06-03 Last updated: 2011-01-13Bibliographically approved

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Almqvist, Fredrik
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