Add time:08/08/2019 Source:sciencedirect.com
GSK3082 – a hepatitis C virus RNA polymerase inhibitor – and a series of analogues with structural diversity at the 5-position were prepared from a 2,2,4,5-tetrasubstituted pyrrolidine obtained with a well-defined stereochemistry from the 1,3-dipolar cycloaddition of the chiral imino ester derived from leucine tert-butyl ester and (R)-2,3-O-isopropylideneglyceraldehyde with methyl acrylate. The chiral 2,2-dimethyl-1,3-dioxolane moiety provided by the glyceraldehyde served as a synthetic equivalent for different substituents and functional groups and these transformations usually required mild reaction conditions and simple work-up procedures. The inhibitory activity of the resulting GSK3082 analogues was studied in vitro in a cell-based assay of the subgenomic HCV RNA replication system. Some of the analogues showed good inhibitory activity with IC50 values in the nanomolar concentration range.
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