Eosin Y photoredox catalyzed net redox neutral reaction for regiospecific annulation to 3-sulfonylindoles <i>via</i> anion oxidation of sodium sulfinate salts
作者:Rajendra S. Rohokale、Shrikant D. Tambe、Umesh A. Kshirsagar
DOI:10.1039/c7ob02977b
日期:——
with 2-alkynyl-azidoarenes was developed with visible light as a mediator. The reaction offers metal and oxidant/reductant free, visible light mediated vicinal sulfonamination of alkynes to 2-aryl/alkyl-3-sulfonylindoles and proceeds via the generation of a sulfur-centered radical through direct oxidation of the sulfinate anion by an excited photocatalyst with a reductive quenching cycle. The mild conditions
Electrophilic indole? Indoles, which are typically nucleophilic, can be made electrophilic throughgoldcatalysis. By using an ortho‐azido group to deliver a nitrene intramolecularly, an arylalkyne is converted into a gold carbene intermediate containing an indole skeleton that is highly electrophilic at the 3‐position. A range of functionalized indoles is readily accessed by utilizing this strategy