Cationic Gold- and Silver-Catalyzed Cycloisomerizations of Propargylic Ureas: A Selective Entry to Oxazolidin-2-imines and Imidazolidin-2-ones
作者:Olga P. Pereshivko、Vsevolod A. Peshkov、Jeroen Jacobs、Luc Van Meervelt、Erik V. Van der Eycken
DOI:10.1002/adsc.201200905
日期:2013.3.11
gold(I) catalysis generally resulted in a formation of oxazolidin‐2‐imines as major products while the application of silver(I) triflate selectively provided the corresponding imidazolidin‐2‐ones. An attempt to rationalize the observed chemoselectivity is described. The scope of both processes was demonstrated through the use of variously substituted secondary propargylic amines.