Metal-Free Synthesis of 3,3-Disubstituted Oxoindoles by Iodine(III)-Catalyzed Bromocarbocyclizations
作者:David C. Fabry、Maciej Stodulski、Stefanie Hoerner、Tanja Gulder
DOI:10.1002/chem.201201232
日期:2012.8.27
“I” did it: An iodine(III)‐mediated bromocarbocyclization was elaborated as an efficient tool for the synthesis of oxoindoles. This method is applicable to a variety of structurally different substrates, also with chemically sensitive groups, and gives access to the heterocycles in a regio‐ and stereoselective fashion (see scheme). The indole‐2‐ones obtained can be converted easily into structurally
light-catalyzed carbohalogenation reaction is reported. A nickel catalyst and an inexpensive phosphine ligand promote the reaction of aryl iodides and aryl bromides with π systems to enable the construction of a library of halogenated heterocyclic scaffolds. Mechanistic studies provide insight regarding fundamental steps of the catalytic cycle, including the reversible C–X bond formation via deuterium labeling