Nucleophilic Addition of Nitrones to Ketones: Development of a New Catalytic Asymmetric Nitrone-Aldol Reaction
作者:Anders Bøgevig、Kurt V. Gothelf、Karl Anker Jørgensen
DOI:10.1002/1521-3765(20021216)8:24<5652::aid-chem5652>3.0.co;2-j
日期:2002.12.16
The scope and potential of the reaction have been investigated and developed. The reaction can also be catalyzed by secondary amines. The use of chiral cyclic amines, such as L-proline leads to optically active beta-hydroxynitrones in moderate yield and with moderate to high enantiomeric excess. The reaction mechanism was studied by kinetic measurements, intermediate and product analysis, and determination
已经发现了一种新的有机反应,其中硝酮在醛缩型反应中与羰基化合物反应,得到官能化的β-羟基硝酮。硝酮的α-碳原子与缺乏电子的酮(如α-酮酸酯,α,β-二酮和三氟甲基酮)进行亲核加成反应,从而以中等至良好的收率提供产物。已经研究和开发了反应的范围和潜力。该反应也可以通过仲胺催化。手性环状胺,例如L-脯氨酸的使用导致中等产率和中等至高对映体过量的光学活性β-羟基硝酮。通过动力学测量,中间体和产物分析以及确定产物的绝对构型来研究反应机理。