Direct N-Carbamoylation of 3-Monosubstituted Oxindoles with Alkyl Imidazole Carboxylates
摘要:
Regioselective N-carbamoylation of oxindoles was achieved through the use of imidazole carboxylate reagents. This reaction provides ready access to N-carbamoyl-3-monosubstituted oxindoles.
Direct N-Carbamoylation of 3-Monosubstituted Oxindoles with Alkyl Imidazole Carboxylates
摘要:
Regioselective N-carbamoylation of oxindoles was achieved through the use of imidazole carboxylate reagents. This reaction provides ready access to N-carbamoyl-3-monosubstituted oxindoles.
Diastereo- and Enantioselective Michael Addition of 3-Substituted Oxindoles to Trifluoromethyl-Substituted Nitro Olefins Catalyzed by a<i>Cinchona</i>-Alkaloid-Derived Squaramide
作者:Mei-Xin Zhao、Fei-Hu Ji、Xiao-Li Zhao、Ze-Zheng Han、Min Shi
DOI:10.1002/ejoc.201301457
日期:2014.1
efficient diastereo- and enantioselectiveMichaeladdition reactions between 3-substituted oxindoles and trifluoromethylated nitro olefins catalyzed by a quinine-derived squaramide have been investigated. The corresponding adducts, each bearing a chiral tertiary carbon center attached to a trifluoromethyl group and adjacent to a quaternary stereocenter at the C3 position of the oxindole, were obtained in
Chiral Calcium VAPOL Phosphate Mediated Asymmetric Chlorination and Michael Reactions of 3-Substituted Oxindoles
作者:Wenhua Zheng、Zuhui Zhang、Matthew J. Kaplan、Jon C. Antilla
DOI:10.1021/ja109824x
日期:2011.3.16
We disclose a novel high yielding and highlyenantioselectivechiralcalciumVAPOL phosphate-catalyzed chlorination of 3-substituted oxindoles with N-chlorosuccinimide (NCS). The reaction conditions are also shown to be effective for the catalyticenantioselective Michael addition of 3-aryloxindoles to methyl vinyl ketone.
Catalytic Enantioselective Dearomatization/Rearomatization of 2-Nitroindoles to Access 3-Indolyl-3′-Aryl-/Alkyloxindoles: Application in the Formal Synthesis of Cyclotryptamine Alkaloids
作者:Wei-Cheng Yuan、Xiao-Jian Zhou、Jian-Qiang Zhao、Yong-Zheng Chen、Yong You、Zhen-Hua Wang
DOI:10.1021/acs.orglett.0c02350
日期:2020.9.18
The first catalyticenantioselective dearomatization/rearomatization of 2-nitroindoles triggered by the Michael addition of 3-monosubstituted oxindoles was established. A wide range of 3-indolyl-3′-alkyloxindoles (up to 99% yield, 97% ee) and 3-indolyl-3′-aryloxindoles (up to 95% yield, 99% ee) were obtained by using an organocatalyst. This method provides an unprecedented strategy to access structurally
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。