Enzymatic resolution of endo-bicyclo[2.2.1]hept-2-yl butybates and related compounds: steric requirements in the bridge-region
作者:K. Königsberger、K. Faber、Ch. Marschner、G. Penn、P. Baumgartner、H. Griengl
DOI:10.1016/0040-4020(89)80096-1
日期:1989.1
Butyrates of endo-bicyclo(2.2.2]octanols and endo-bicyclo[2.2.1] heptan-2-ols, the latter bearing substituents of different size at C-7, were hydrolysed enzymatically using Candida cylindracea lipase. Steric factors were found to influence enantioselection: In the bicyclo [2.2.1]heptane series substrates having small substituents on C-7 were generally resolved with better enantioselection (70 to >80%
使用Candida cylindracea脂肪酶酶促水解内双环(2.2.2)辛醇和内双环[2.2.1]庚烷-2-醇的丁酸酯,后者在C-7处具有不同大小的取代基。影响对映体的选择:在C-7上具有较小取代基的双环[2.2.1]庚烷系列底物通常比对体积大的(30-60%ee)的对映体选择(70到> 80%ee)更好。该方法为合成环戊烷和-己烷体系提供了对映体富集的结构单元。