Enzymatic resolution of norbor(NE)nylmethanols in organic media and an application to the synthesis of (+)- and (−)-endo-Norbornene lactone.
作者:A.J.M. Janssen、A.J.H. Klunder、B. Zwanenburg
DOI:10.1016/s0040-4020(01)80984-4
日期:1991.7
The enzymatic resolution of some norbornene carboxylic acids, norbornenylmethanols and -methylamines was evaluated. The kinetic resolution of norbornyl- and norbornenylmethanols by Porcine Pancreatic Lipase (PPL)-catalyzed transesterification in methyl acetate as the solvent leads to corresponding acetates and remaining methanols both of high enantiomeric purity. A useful application is the synthesis of both enantiomers of endo-norbornene lactone 8n via transesterification of iodolactone 18. The influence of structural variations on the efficiency of the PPL-catalyzed resolution of lactone methanols 21, 23, 25 and 28, at the optimal reaction conditions established for iodolactone 18, was investigated.