Abstract
Biological screening of (hetero)aromatic compounds allowed the identification of some novel inhibitors of Aβ 1–40 aggregation, bearing indane and indole rings as common scaffolds. Molecular decoration of lead compounds led to inhibitors exhibiting a potency, measured by the Thioflavin T fluorimetric assay, ranging from high to low micromolar IC 50. The 2-( p-isopropylphenyldiazenylmethylene)indolone derivative 6c resulted as the most potent aggregation inhibitor exhibiting an IC 50 of 1.4 μM, with complete lack of fibril formation as confirmed by transmission electron microscopy. Structure–activity relationships suggested that binding to the Aβ peptide may be largely guided by π-stacking and hydrogen bond interactions.
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