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Eur J Med Chem. 2011 Apr;46(4):1103-16. doi: 10.1016/j.ejmech.2011.01.025. Epub 2011 Jan 21.

Synthesis and application of a bromomethyl substituted scaffold to be used for efficient optimization of anti-virulence activity.

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1
Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden.

Abstract

Pilicides are a class of compounds that attenuate virulence in Gram negative bacteria by blocking the chaperone/usher pathway in Escherichia coli. It has also been shown that compounds derived from the peptidomimetic scaffold that the pilicides are based on can prevent both Aβ aggregation and curli formation. To facilitate optimizations towards the different targets, a new synthetic platform has been developed that enables fast and simple introduction of various substituents in position C-7 on the peptidomimetic scaffold. Importantly, this strategy also enables introduction of previously unattainable heteroatoms in this position. Pivotal to the synthetic strategy is the synthesis of a C-7 bromomethyl substituted derivative of the ring-fused dihydrothiazolo 2-pyridone pilicide scaffold. From this versatile and reactive intermediate various heteroatom-linked substituents could be introduced on the scaffold including amines, ethers, amides and sulfonamides. In addition, carbon-carbon bonds could be introduced to the sp(3)-hybridized bromomethyl substituted scaffold by Suzuki-Miyaura cross couplings. Evaluation of the 24 C-7 substituted compounds in whole-bacterial assays provided important structure-activity data and resulted in the identification of a number of new pilicides with activity as good or better than those developed previously.

PMID:
21316127
PMCID:
PMC3694777
DOI:
10.1016/j.ejmech.2011.01.025
[Indexed for MEDLINE]
Free PMC Article
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