Effect of ether versus ester tethering on Heck cyclizations
作者:Steven R. Woodcock、Bruce P. Branchaud
DOI:10.1016/j.tetlet.2005.08.072
日期:2005.10
Ether tethers allow Heck cyclizations to proceed in high yields. Ester tethers lead to low yields. Styrene trapping experiments indicate that ester reactions form viable organopalladium intermediates that cannot cyclize efficiently. (c) 2005 Elsevier Ltd. All rights reserved.