Immobilization of Functionalized epi-Cinchonine Organocatalysts on Controlled Porous Glass Beads: Applications in Batch and Continuous Flow
作者:Anthony J. Burke、Ana C. Amorim、Daniela P. Fonseca、Elisabete P. Carreiro、Gesine J. Hermann、Hans-Jürgen Federsel
DOI:10.1055/a-1916-4858
日期:2022.10
squaramide-cinchonine organocatalyst was immobilized in a controlled way onto three types of commercial porous glass beads EziG™ (EziG OPAL, EziG Amber, and EziG Coral) and applied in asymmetric Michael reactions. The performance of the immobilized catalysts was evaluated under batch and continuous-flow conditions, showing promising results in both approaches. In batch reactions, 0.8 and 1.6 mol% of
一种著名的方酰胺-辛可宁有机催化剂以受控方式固定在三种类型的商业多孔玻璃珠 EziG™(EziG OPAL、EziG Amber 和 EziG Coral)上,并应用于不对称迈克尔反应。在分批和连续流动条件下评估了固定化催化剂的性能,在这两种方法中都显示出有希望的结果。在分批反应中,0.8 和 1.6 mol% 的固定化辛可宁-方甲酰胺为产物提供了优异的产率(高达 99%)和对映选择性(高达 99% ee)。这些优异的结果也在连续流动反应的情况下得到验证,其中 0.8 和 1.6 mol% 的催化剂固定在玻璃珠上,提供了具有非凡产率(高达 99%)和非常高的对映选择性(高达 97 %ee)。