“On water”-promoted direct alkynylation of isatins catalyzed by NHC–silver complexes for the efficient synthesis of 3-hydroxy-3-ethynylindolin-2-ones
作者:Xiao-Pu Fu、Li Liu、Dong Wang、Yong-Jun Chen、Chao-Jun Li
DOI:10.1039/c0gc00807a
日期:——
The direct alkynylation of isatins catalyzed by NHCâAg complexes via the activation of alkyne CâH bond on water was developed for the efficient synthesis of 3-hydroxy-3-ethynylindolin-2-ones under an air atmosphere. A remarkable rate-enhancement by water in the aqueous heterogeneous system was observed.
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.