Copper-Catalyzed Asymmetric Propargylic Alkylation with Oxindoles: Diastereo- and Enantioselective Construction of Vicinal Tertiary and All-Carbon Quaternary Stereocenters
作者:Jin-Tao Xia、Xiang-Ping Hu
DOI:10.1021/acs.orglett.9b04621
日期:2020.2.7
stereoselective construction of vicinal tertiary and all-carbon quaternary stereocenters in a 3,3-disubstituted oxindole skeleton has been realized. The reaction proceeded smoothly under the catalysis of Cu(MeCN)4PF6 combined with a chiral tridentateferrocenyl P,N,N ligand, leading to a broad range of optically active 3,3-disubstituted oxindoles in high yields and with excellent diastereo- and enantioselectivities
Catalytic Asymmetric Ring-Opening Reactions of Aziridines with 3-Aryl-Oxindoles
作者:Linqing Wang、Dan Li、Dongxu Yang、Kezhou Wang、Jie Wang、Pengxin Wang、Wu Su、Rui Wang
DOI:10.1002/asia.201501369
日期:2016.3.4
enantioselective ring‐opening alkylation reaction between 3‐aryl‐oxindole and N‐(2‐picolinoyl) aziridine has been realized for the first time. The reaction is efficiently mediated by a simple in‐situ‐generated magnesium catalyst and 3,3′‐fluorinated‐BINOL (BINOL=1,1′‐binaphthalene‐2,2′‐diol) has been identified as a powerful chiral ligand. Notably, the fluorine atom on the chiral ligand plays a key role
Catalytic Double Stereoinduction in Asymmetric Allylic Alkylation of Oxindoles
作者:Barryâ M. Trost、Yong Zhang
DOI:10.1002/chem.200902770
日期:2010.1.4
A highly regio‐, diastereo‐, and enantioselective allylicalkylation reaction of 3‐monosubstituted oxindoles catalyzed by molybdenum is described. The reaction is affected by the electronic and steric variations of the nucleophile. The use of appropriate N‐protecting group is particularly important for achieving high regio‐ and diastereoselectivity. Products from this reaction, containing vicinal quaternary‐tertiary
描述了钼催化的 3-单取代羟吲哚的高度区域、非对映和对映选择性烯丙基烷基化反应。该反应受到亲核试剂的电子和空间变化的影响。使用适当的 N 保护基团对于实现高区域和非对映选择性特别重要。该反应的产物含有邻位季-叔立构中心,是有价值的合成中间体,应该在生物碱合成中得到应用。