Asymmetric α-hydroxylation of β-dicarbonyl compounds by C-2′ modified cinchonine-derived phase-transfer catalysts in batch and flow microreactors
作者:Xiao-Fei Tang、Jing-Nan Zhao、Yu-Feng Wu、Ze-Hao Zheng、Cun-Fei Ma、Zong-Yi Yu、Lei Yun、Guang-Zhi Liu、Qing-Wei Meng
DOI:10.1080/00397911.2020.1781183
日期:2020.8.17
Abstract The asymmetric α-hydroxylation of β-dicarbonyl compounds was catalyzed by C-2′-modified cinchonine-derived phase-transfer catalysts. Excellent yields (up to 95%) and good enantioselectivities (up to 89% ee) were obtained. The reaction was carried out in a flow microreactor and similar results were obtained (up to 93% yield, 84% ee), the residence time was shortened from 24 h in batch to 2 h
摘要 β-二羰基化合物的不对称α-羟基化是由C-2'-修饰的辛可宁衍生的相转移催化剂催化的。获得了优异的产率(高达 95%)和良好的对映选择性(高达 89% ee)。该反应在流动微反应器中进行,获得了相似的结果(产率高达 93%,ee 为 84%),停留时间从分批的 24 小时缩短到 2 小时。图形概要