Gold-catalyzed cycloisomerizations of ene-ynamides
作者:Sylvain Couty、Christophe Meyer、Janine Cossy
DOI:10.1016/j.tet.2008.10.108
日期:2009.2
The gold-catalyzedcycloisomerizations of 1,6-ene-ynamides proceed under mild conditions and lead to cyclobutanones from terminal or trimethylsilyl substituted ynamides, or to carbonyl compounds bearing a 2,3-methanopyrrolidine subunit from substrates possessing a propargylic alcohol moiety. High diastereoselectivities are observed with 1,6-ene-ynamides having a stereocenter at the α or β position
Chemoselective Epoxidation of Ene-Ynamides: Intramolecular Cyclopropanation Induced by the Intermediate α-Oxocarbene
作者:Christophe Meyer、Sylvain Couty、Janine Cossy
DOI:10.1055/s-2007-990841
日期:——
Chemoselective epoxidation of the triple bond of ene-ynamides generates an α-oxocarbene intermediate that effects the intramolecular cyclopropanation of the alkene.