A facile enzyme assisted route to enantiomerically pure δ - lactones
摘要:
Enantiomerically pure 1,2-epoxyalkanes, obtained via enzymatic resolution of suitable precursors can serve as key building blocks for the preparation of the title compounds. Using a simple and very short synthetic protocol enantiomerically pure delta-lactones are obtained in high yields.
Enzyme assisted synthesis of enantiomerically pure δ-lactones
摘要:
Both enantiomeric series of a wide variety of optically pure 6-alkylated delta-lactones - saturated as well as unsaturated - were prepared via an enzyme mediated route. The key reaction step is the nucleophilic ring opening of enantiomerically pure alkyl-oxiranes, accessible via the corresponding beta-hydroxythioethers which can be obtained enantiomerically pure via enzyme catalyzed kinetic resolutions.
modification of methylricinoleate by etherification of the hydroxyl group was accomplished by using a nonclassical ruthenium‐catalyzed allylation reaction and also by esterification. Methylricinoleate derivatives were engaged in ring‐closing metathesis (RCM) reactions leading to biosourced 3,6‐dihydropyran and α,β‐unsaturated lactone derivatives with concomitant production of polymerprecursors. Sequential