starting from commercially available mixtures of the diols (dl/meso approximately 1:1) has been realized by combining a fast ruthenium-catalyzed epimerization with an enzymatic transesterification. The in situ coupling of these two processes produces the diacetates in high yield in >99 % enantiomeric excess.
通过将快速
钌催化的差向异构化与酶促
酯交换反应相结合,已经从可商购获得的二醇混合物(dl / meso约为1:1)开始高效合成
2,4-戊二醇和
2,5-己二醇的对映体纯二
乙酸酯。这两个过程的原位偶合以> 99%对映体过量的高收率生产出二
乙酸酯。