Abstract

The stereoselective acylation of meso-tetrahydropyrans 6 and 7 by enol esters (vinyl acetate or isopropenyl acetate) in the presence of Candida antarctica lipase in organic media gave the corresponding (2 R,4 S,6 S)-monoesters 10 and 11 in high enantiomeric purity. The hydrolysis of the corresponding diacetate derivatives 8 and 9 in the presence of the same enzyme provided the opposite enantiomers, (2 S,4 R,6 R)-monoesters 10 and 11.

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