Gold- and Platinum-Catalyzed Cycloisomerization of Enynyl Esters versus Allenenyl Esters: An Experimental and Theoretical Study
作者:Nicolas Marion、Gilles Lemière、Andrea Correa、Chiara Costabile、Rubén S. Ramón、Xavier Moreau、Pierre de Frémont、Rim Dahmane、Alexandra Hours、Denis Lesage、Jean-Claude Tabet、Jean-Philippe Goddard、Vincent Gandon、Luigi Cavallo、Louis Fensterbank、Max Malacria、Steven P. Nolan
DOI:10.1002/chem.200801387
日期:2009.3.16
Ester‐way to heaven: Unexpected formation of bicyclo[3.1.0]hexene 4 was the main focus of combined experimental and theoreticalstudies on the Au‐catalyzed cycloisomerization of branched dienyne 1 (see scheme), which provided better understanding of the mechanistic details governing the cyclization of enynes bearing a propargylic ester group.
The platinum- and gold-catalyzedcycloisomerization of enyne systems has been carried out in various ionic liquids (ILs). In some cases, better selectivities and shorter reaction times have been observed compared to conventional conditions.