Enantiomerical excess determination, purification and biological evaluation of (3S) and (3R) α,β-butenolide analogues of isobenzofuranone

The asymmetric synthesis of isobenzofurane analogues, new potential antiviral agents, is reported. High performance liquid chromatography (HPLC) was the technique chosen to separate the enantiomers. We describe this chiral separation and then determine the enantiomerical excess. The biological results of each tested enantiomer are given.