Diastereoselective Darzens Condensations of α-Haloamides: Influence of Aryl Substituents on Diastereoselectivity
作者:Michael North、Francesca Pizzato
DOI:10.2174/157017809789869465
日期:2009.10.1
N,N-Diaryl α-haloamides undergo Darzens condensations with aldehydes induced by metal hydroxides. The diastereoselectivity of epoxide formation is strongly influenced by the electronic properties of the arylamide, which can be rationalised on the basis of the acidity of the substrate hydrogens and hence on reaction occurring under kinetic or thermodynamic control.
N,N-二芳基α-卤代酰胺在金属氢氧化物诱导下与醛发生Darzens缩合反应。环氧化合物的立体选择性强烈受芳酰胺电子性质的影响,这可以通过底物氢的酸度以及反应在动力学或热力学控制下进行来进行合理解释。