α,β-Divinyl Tetrahydropyrroles as Chiral Chain Diene Ligands in Rhodium(I)-Catalyzed Enantioselective Conjugated Additions
作者:Qian Li、Zhe Dong、Zhi-Xiang Yu
DOI:10.1021/ol103152t
日期:2011.3.4
A series of α,β-divinyl tetrahydropyrroles, synthesized by asymmetric allylic C−H bond activation/conjugated diene addition reaction of ene-2-dienes, were found to be very efficient chiral chain diene ligands in the rhodium-catalyzedconjugatedaddition of organoboronic acids to various α,β-unsaturated compounds, achieving the desired chiral adducts with good to excellent yields and ee values.
Chiral N-tert-butanesulfinyl α,β-unsaturated ketimine: a simple and highly effective olefin/sulfinimide hybrid ligand for asymmetric 1,4-additions
作者:Xiangqing Feng、Beibei Wei、Jing Yang、Haifeng Du
DOI:10.1039/c1ob05971h
日期:——
One novel type of chiral olefin/sulfinimide hybrid ligands has been developed through a simple one-step condensation of α,β-unsaturated ketones with tert-butanesulfinamide and utilized successfully for rhodium-catalyzedasymmetricconjugatedadditions to furnish the desired adducts in high yields with excellent ee's.