Indium-Mediated Allylation and Propargylation of Isatins: A Facile Synthesis of 3-Substituted 3-Hydroxyoxindoles
作者:Vijay Nair、Sindu Ros、C. N. Jayan、S. Viji
DOI:10.1055/s-2003-42428
日期:——
Isatins undergo efficient allylation/propargylation when reacted with allyl/propargyl bromide in the presence of indium and sodium iodide to afford the corresponding 3-substituted 3-hydroxyoxindoles.
Zn-Catalyzed enantioselective allylation and allenylation of isatins by virtue of a proline-derived chiral ligand
作者:Kuiliang Li、Xiang Sun、Shuangshuang Zhao、Tong Li、Zhenggen Zha、Zhiyong Wang
DOI:10.1039/d1cc06563g
日期:——
An asymmetric allylation and allenylation of isatins with facile organoboron reagents was developed under the catalysis of a Lewis acid. A series of optically pure 3-allyl-3-hydroxyoxindoles and 3-allenyl-3-hydroxyoxindoles can be obtained in excellent yields (up to 99% yield) and high enantioselectivities (up to 97% ee). The possible transition state was supported by DFT calculation and the corresponding