Development of new drugs with broad-spectrum to combat RNA viruses would be beneficial to mankind but faces a great challenge. We designed and efficiently synthesized a series of quinazolin-4-amine-SCH2-coumarin conjugated compounds. Our data of the virus-cell-based assay show five new conjugates inhibit chikungunya virus with EC50 values as potent as 1.96 μM and two conjugates inhibit hepatitis C virus with EC50 values as low as 16.6 μM. These conjugates possess a xylene substituent at the C-4 amino group of quinazoline and a t-butyl substituent at the C-6' position of coumarin.
Keywords: Broad-spectrum; Chikungunya virus; Coumarin; Hepatitis C virus; Quinazolin-4-amine; Structure–activity relationship.
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