Dynamic Kinetic Resolution of Secondary Diols via Coupled Ruthenium and Enzyme Catalysis
作者:B. Anders Persson、Fernando F. Huerta、Jan-E. Bäckvall
DOI:10.1021/jo990447u
日期:1999.7.1
Enzymatic acylation of secondary symmetrical diols (as meso/dl mixtures) in combination with ruthenium-catalyzed isomerization of the diol led to efficient dynamic kinetic resolution. In this way, a meso/dl mixture of the diol was transformed to enantiomerically pure (R,R)-diacetate, making efficient use of all the diol material. For some of the flexible substrates, substantial amounts of meso-diacetates
二级对称二醇的酶促酰化(作为 meso/dl 混合物)与钌催化的二醇异构化相结合,导致有效的动态动力学拆分。通过这种方式,二醇的内消旋/dl 混合物转化为对映异构纯的 (R,R)-二乙酸酯,从而有效利用所有二醇材料。对于一些柔性基材,大量的内消旋二乙酸盐作为副产物形成。结果表明,内消旋产物的主要部分是通过分子内酰基转移途径形成的。