Asymmetric Michael addition reaction of 3-substituted-N-Boc oxindoles to activated terminal alkenes catalyzed by a bifunctional tertiary-amine thiourea catalyst
作者:Xin Li、Zhi-Guo Xi、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1039/b918644a
日期:——
article reports an organocatalytic strategy for the asymmetric catalysis of chiral oxindoles bearing 3-position all-carbonquaternarystereocenters. Accordingly, highly enantioselectiveMichaeladdition reactions of 3-substituted oxindoles to terminal alkenes have been developed by utilizing a bifunctional tertiary-amine thiourea catalyst. The reactions accommodate a number of Michael donor compounds
Nickel(II)-Catalyzed Asymmetric Michael Addition of Oxindoles with Modified N,N,O-Tridentate Chiral Phenanthroline Ligands
作者:Yuki Naganawa、Hisao Nishiyama、Hiroki Abe
DOI:10.1055/s-0035-1561630
日期:——
Nickel(II)-catalyzed enantioselective Michael addition of N-Boc-oxindole derivatives with methyl vinyl ketone was demonstrated to give the corresponding adducts having chiral all-carbon quaternary centers with up to 87% ee in the presence of axially chiral N,N,O-tridentate phenanthroline ligand.
在轴向手性 N,N 存在下,镍 (II) 催化的 N-Boc-羟吲哚衍生物与甲基乙烯基酮的对映选择性迈克尔加成得到相应的加合物,其具有高达 87% 的 ee 手性全碳季中心, O-三齿菲咯啉配体。
He, Rongjun; Ding, Changhua; Maruoka, Keiji, Angewandte Chemie - International Edition, 2009, vol. 48, p. 4559 - 4561