Selectivity of Candida rugosa lipase in simultaneous separation of skeletal isomers, desymmetrization, and kinetic racemate cleavage of 9-oxabicyclononanediols
The diols 2 and 3, available in one step from cycloocta-1,5-diene, are selectively acetylated at the (R)-centers using Candida rugosa lipase to give the corresponding enantiopure compounds. In contrast, the (S,S)-enantiomer of 11 is transformed under identical conditions. The stereoselectivity of the lipase has been investigated by modeling of the transition state geometries at the active site of the enzyme. (C) 2003 Published by Elsevier Science Ltd.