Domino C−S/C−N Bond Formation Using Well‐Defined Copper‐Phosphine Complex Catalyst: Divergent Approach to 3‐Sulfenylated Indoles
作者:Ramuel John Inductivo Tamargo、Sung Hong Kim、Yong Rok Lee
DOI:10.1002/adsc.201900612
日期:2019.9.3
3‐thioindoles in good‐to‐excellent yields involving sulfenylation between 2‐nitrocinnamaldehydes and various thiols using a well‐defined copper(I)‐phosphine complex catalyst. This unconventional divergent approach involves in situ generation of indoles via domino C−S/C−N bondformation initiated by sulfa‐Michael addition followed by intramolecular N‐heteroannulation. This protocol shows good chemoselectivity
GRAPHICAL ABSTRACT Abstract A simple method was developed for the synthesis of 3-chalcogen indoles via iodine-promoted direct 3-selanyl- and 3-sulfenylation of indoles with dichalcogenides. The reaction was carried out smoothly in EtOH under air at room temperature, selectively giving a series of 3-chalcogen indoles bearing different functional groups in good to excellent yields. The procedure has