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。