A highly efficient copper-catalyzedasymmetricaddition of terminal alkynes to isatins has been developed. In the presence of a catalytic amount of copper iodide and a chiral phosphine ligand, the reaction gave the corresponding chiral 3-alkynyl-3-hydroxyindolin-2-ones in high yields with high enantioselectivity. This methodology has a broad substrate scope, and the synthetic utility of the present
Zinc-mediated synthesis of 3-alkynyl-3-hydroxyindolin-2-ones by addition of iodoalkynes to isatins
作者:Vinay K. Singh、Abhishek Upadhyay、Rana Krishna Pal Singh
DOI:10.1016/j.tetlet.2016.11.124
日期:2017.1
An efficient and economical method was developed for synthesis of 3 alkynyl-3-hydroxyindolin-2-ones by addition of iodoalkynes to isatins using zinc dust.