Synthesis and biological evaluation of optically active conjugated γ- and δ-lactone derivatives

An efficient synthesis of racemic and both enantiomeric forms of heteroaryl substituted γ- and δ-lactone derivatives derived from allyl and homoallyl alcohol backbones has been accomplished via ring closing metathesis reaction. 2-Heteroaryl substituted allyl and homoallyl alcohols have been efficiently resolved through enzymatic method with high ee (97-99%) and known stereochemistry. Antimicrobial and antioxidant activities of target lactones were evaluated.