Chiral Diene-Phosphine Tridentate Ligands for Rhodium-Catalyzed Asymmetric Cycloisomerization of 1,6-Enynes
作者:Takahiro Nishimura、Yuko Maeda、Tamio Hayashi
DOI:10.1021/ol2013236
日期:2011.7.15
Asymmetriccycloisomerization of nitrogen-bridged1,6-enynes proceeded in the presence of a cationic rhodium complex coordinated with a chiral diene/phosphine tridentate ligand to give high yields of chiral 3-azabicyclo[4.1.0]heptenes with high enantioselectivity.
Unexpected results of enyne metathesis using a ruthenium complex containing an N-heterocyclic carbene ligand
作者:Tsuyoshi Kitamura、Yoshihiro Sato、Miwako Mori
DOI:10.1039/b101453f
日期:——
Metathesis of enyne having 1,1-substituted alkene, carried out with the new generation of a rutheniumcarbene complex containing an N-heterocycliccarbeneligand, gave five- and six-membered cyclic compounds in high yield.