Small molecule fusion inhibitors: Design, synthesis and biological evaluation of (Z)-3-(5-(3-benzyl-4-oxo-2-thioxothiazolidinylidene)methyl)-N-(3-carboxy-4-hydroxy)phenyl-2,5-dimethylpyrroles and related derivatives targeting HIV-1 gp41

Add time:08/04/2019    Source:sciencedirect.com

By a scaffold elongation strategy, a series of (Z)-3-(5-(3-benzyl-4-oxo-2-thioxothiazolidinylidene)methyl)-N-(3-carboxy-4-hydroxy)phenyl-2,5-dimethylpyrroles and related derivatives with a linear multi-aromatic-ring skeleton were designed, synthesized, and evaluated in HIV-1 gp41 and cellular assays. Among them, the most active compounds, 12e, 12g, and 12k with a one-carbon linker (n = 1) between the rhodanine (C) and phenyl (D) rings, exhibited very promising inhibitory potency with IC50 values of 1.8–2.6 μM and EC50 values of 0.3–1.5 μM against gp41 6-HB formation and HIV-1 replication in MT-2 cells, respectively. Additionally, they were almost equally effective against both T20-sensitive and resistant strains. The related SAR studies and molecular modeling results provided potential for further developing a new class of non-peptide small molecular fusion inhibitors targeting the HIV-1 gp41.

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