Rhodium(II)-Catalyzed Equilibration of Push-Pull Carbonyl and Ammonium Ylides. A Computationally Based Understanding of the Reaction Pathway
作者:Albert Padwa、James P. Snyder、Erin A. Curtis、Scott M. Sheehan、Kimberly J. Worsencroft、C. Oliver Kappe
DOI:10.1021/ja001088j
日期:2000.8.1
been found to undergo a rhodium(II)-catalyzed transformation, producing five-membered ammonium or carbonyl ylides depending on the reaction conditions used. In the absence of an external dipolarophile, ammonium ylides are the exclusive products formed. In most cases these ylides cannot be isolated as they readily undergo sigmatropic rearrangement or fragmentation reactions. In the presence of typical