One-Pot Synthesis of Enantiopure 3,4-Dihydroisocoumarins through Dynamic Reductive Kinetic Resolution Processes
作者:Juan Mangas-Sánchez、Eduardo Busto、Vicente Gotor、Vicente Gotor-Fernández
DOI:10.1021/ol401606x
日期:2013.8.2
A straightforward chemoenzymatic synthesis of enantiopure 4-alkyl-3-methyl-3,4-dihydroisocoumarins through a ketoreductase-catalyzed one-pot dynamic reductive kinetic resolution is reported. E. coli/ADH-A cells have shown outstanding diastereo- and enantioselectivity toward the bioreduction of a series of racemic ketones, with the use of anion exchange resins or triethylamine being compatible in the
报道了通过酮还原酶催化的一锅动态还原动力学拆分的对映纯4-烷基-3-甲基-3,4-二氢异香豆素的直接化学酶法合成。大肠杆菌/ ADH-A细胞在一系列消旋酮的生物还原方面表现出出色的非对映选择性和对映选择性,在相同的水性反应介质中使用阴离子交换树脂或三乙胺可相容。如此制得的对映纯醇随后在酸性介质中环化,得到相应的内酯,转化率良好至极好(72–96%),选择性极好(dr≥99:1,ee> 99%)。