作者:Vladislav Semak、Thomas A. Metcalf、Mary Ann A. Endoma-Arias、Pavel Mach、Tomas Hudlicky
DOI:10.1039/c2ob25202c
日期:——
A series of ortho-, meta-, and para- halogen-substituted methyl benzoate esters was subjected to enzymatic dihydroxylation via the whole-cell fermentation with E. coli JM109 (pDTG601A). Only ortho-substituted benzoates were metabolized. Methyl 2-fluorobenzoate yielded one diol regioselectively whereas methyl 2-chloro-, methyl 2-bromo- and methyl 2-iodobenzoates each yielded a mixture of regioisomers. Absolute stereochemistry was determined for all new metabolites. Computational analysis of these results and a possible rationale for the regioselectivity of the enzymatic dihydroxylation is advanced.
一系列邻、间和对卤代甲基苯甲酸酯通过全细胞发酵与大肠杆菌JM109(pDTG601A)发生酶促二羟基化反应。只有邻取代的苯甲酸酯被代谢。2-氟苯甲酸甲酯产生一种二醇,而2-氯、2-溴和2-碘苯甲酸甲酯则分别产生一种区域异构体混合物。所有新代谢产物的绝对立体化学结构均已确定。对这些结果进行了计算分析,并提出了酶促二羟基化反应区域选择性的可能原理。