Asymmetric Synthesis of Bicyclic Diol Derivatives through Metal and Enzyme Catalysis: Application to the Formal Synthesis of Sertraline
作者:Patrik Krumlinde、Krisztián Bogár、Jan-E. Bäckvall
DOI:10.1002/chem.200903114
日期:2010.4.6
Enzyme‐ and ruthenium‐catalyzed dynamic kinetic asymmetric transformation (DYKAT) of bicyclic diols to their diacetates was highly enantio‐ and diastereoselective to give the corresponding diacetates in high yield with high enantioselectivity (99.9 % ee). The enantiomerically pure diols are accessible by simple hydrolysis (NaOH, MeOH), but an alternative enzyme‐catalyzed ester cleavage was also used
酶和钌催化的双环二醇向其双乙酸酯的动态动力学不对称转化(DYKAT)具有很高的对映和非对映选择性,从而以高收率和高对映选择性(99.9%ee)得到相应的双乙酸酯 。对映体纯的二醇可通过简单的水解(NaOH,MeOH)进行水解,但是还使用了另一种酶催化的酯裂解方法,以极高的非对映异构体纯度得到反式二醇(R,R)-1 b(反式/顺式= 99.9:0.1,> 99.9% ee)。结果表明,在钌催化的Oppenauer型反应中,二醇可以选择性地氧化为酮醇。从简单的外消旋的顺式/反式二醇1b证实了舍曲林的形式对映体选择性合成。