作者:Erwin R. van Rijssel、Theodorus P. M. Goumans、Gerrit Lodder、Herman S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée
DOI:10.1021/ol4012053
日期:2013.6.21
is often assumed that the stereochemistry in Ugi multicomponent reactions is determined in the final Mumm rearrangement step, experimental and computational evidence that Ugi reactions on hydroxylated pyrrolines proceed under kinetic control is reported. The stereochemistry of the reaction is established with the addition of the isocyanide to the intermediate iminium ion, whose conformation is determined
尽管通常认为Ugi多组分反应中的立体化学是在最后的Mumm重排步骤中确定的,但据报道实验和计算证据表明在动力学控制下Ugi在羟基化吡咯啉上的反应正在进行。反应的立体化学是通过将异氰酸酯加到中间体亚胺离子上来建立的,该亚胺离子的构象由其取代模式决定。