Hydroxoiridium/Chiral Diene Complexes as Effective Catalysts for Asymmetric Annulation of α-Oxo- and Iminocarboxamides with 1,3-Dienes
作者:Miyuki Hatano、Takahiro Nishimura
DOI:10.1002/anie.201505382
日期:2015.9.7
The asymmetric [3+2] annulation of α‐oxo‐ and α‐iminocarboxamides with 1,3‐dienes catalyzed by hydroxoiridium/chiraldienecomplexes was realized, giving high yields of the corresponding γ‐lactams with high enantioselectivity.
Chemoselective Construction of Substituted Conjugated Dienes Using an Olefin Cross-Metathesis Protocol
作者:Timothy W. Funk、Jon Efskind、Robert H. Grubbs
DOI:10.1021/ol047929z
日期:2005.1.1
[Reaction: see text] Various substituted conjugateddienes have been made by olefin cross-metathesis. Using either electronic or steric "protection," one of the olefins of the conjugateddiene was deactivated relative to the other for cross-metathesis. The reactions proceed with very high chemoselectivity and, when steric deactivation is used, very high diastereoselectivity.
Iridium-Catalyzed Annulation of Salicylimines with 1,3-Dienes
作者:Yusuke Ebe、Takahiro Nishimura
DOI:10.1021/ja504990a
日期:2014.7.2
Iridium-catalyzed annulation of salicylimines with 1,3-dienes gave high yields of the corresponding 4-aminochromanes with high stereoselectivity. The use of a chiral diene ligand enabled the asymmetric reaction to give 4-aminochromanes with high enantioselectivity.