irreversible transesterification of alcoholic functions in organic solvent, both enantiomers of zingerol and dehydrozingerol O-methyl derivatives 1 and 2 were obtained in high optical purity. The biocatalytic method was then extended to the corresponding biphenyl derivatives 5–8 for which an one-pot resolution/desymmetrization was carried out on the whole racemic/meso mixtures to give single stereoisomers