l-Prolinal Dithioacetal: A Highly Effective Organocatalyst for the Direct Nitro-Michael Addition to Selected Cyclic and Aromatic Ketones
作者:Piotr Pomarański、Zbigniew Czarnocki
DOI:10.1055/s-0037-1611531
日期:2019.9
trans-β-nitrostyrenes. Also, the first asymmetric syntheses of selected 2-methyl-4-nitro-1,3-diphenylbutan-1-one derivatives by application of the obtained organocatalyst is presented. The synthesis of novel l-prolinal dithioacetal and its application as an organocatalyst for the direct Michael addition of cyclic ketones and acetophenone derivatives to trans-β-nitrostyrene and related compounds is described
Enantioselective decarboxylative Michael addition of β-ketoacids to nitroalkenes catalyzed by binaphthyl-derived organocatalysts
作者:Hyoung Wook Moon、Dae Young Kim
DOI:10.1016/j.tetlet.2012.09.100
日期:2012.11
The catalytic enantioselective decarboxylative Michael addition reaction promoted by chiral bifunctional organocatalysts has been developed, allowing facile synthesis of the corresponding γ-nitro ketones with excellent enantioselectivity (up to 97% ee). The method reported represents a valuable approach utilizing β-ketoacids as synthetic equivalents of aryl methyl ketones.