Enantio- and Diastereoselective Michael Addition of Cyclic Ketones/Aldehydes to Nitroolefins in Water as Catalyzed by Proline-Derived Bifunctional Organocatalysts
作者:Daeil Bae、Jin Won Lee、Do Hyun Ryu
DOI:10.1021/acs.joc.2c02218
日期:2022.12.16
New l-proline-derived bifunctional secondary amine organocatalysts were synthesized for enantioselective Michael reactions in water as a solvent. Application of these catalysts in Michael additions provided high yield (up to 97%) with high stereoselectivity (dr up to 99:1 and ee up to 99%). The effect of phenyl group at (R)-C6 in the catalyst was investigated and played a key role in successful catalysis
合成了新的l-脯氨酸衍生的双功能仲胺有机催化剂,用于在水中作为溶剂进行对映选择性迈克尔反应。这些催化剂在迈克尔加成中的应用提供了高收率(高达 97%)和高立体选择性(dr 高达 99:1 和 ee 高达 99%)。通过密度泛函理论计算,研究了催化剂中( R )-C 6处苯基的作用,发现其对催化成功起着关键作用。该反应的合成效用已通过 Sch 50971 的正式合成得到证实,Sch 50971 是一种新型组胺 H 3受体激动剂。