Chemo- and Stereoselective Reduction of β-Keto-α-oximino Nitriles by Using Baker's Yeast
作者:Kilwoong Mo、Soon Bang Kang、Youseung Kim、Yong Sup Lee、Jae Wook Lee、Gyochang Keum
DOI:10.1002/ejoc.201403393
日期:2015.2
The baker’s yeast mediated reduction of β-keto-α-oximino nitriles 3 at 20 °C gave β-hydroxy-α-oximino nitriles 4 in high yields with high enantiomeric purity [enantiomeric excess (ee) values 99%]. At room temperature, the same reaction afforded the product in a slightly lower yield. The β-hydroxyα-oximino nitriles 4 were obtained as single stereoisomers according to chiral GC–MS analyses and the 1
面包酵母介导的 β-酮基-α-肟基腈 3 在 20 °C 下的还原以高产率和高对映体纯度 [对映体过量 (ee) 值 99%] 得到 β-羟基-α-肟基腈 4。在室温下,相同的反应以略低的产率得到产物。根据手性 GC-MS 分析以及相应 Mosher 酯的 1 H 和 19 F NMR 光谱,以单一立体异构体形式获得 β-羟基α-肟基腈 4。绝对的