Aryldiazonium-Salt-Triggered Carboxylative Azotization of Pyrroles or Indoles with Polyhalomethanes via Halogen-Atom Transfer (XAT)
Tianbao Zhang, Fang Wang, Jun-Yao Ouyang, Zhen-Wei Luo, Jing‐Hao Qin, Jin‐Heng Li, Xuan‐Hui Ouyang
Abstract
A halogen-atom-transfer (XAT)-based method for carbonylazotization of pyrroles or indoles with aryldiazonium salts and polyhalomethanes via dual C(sp 2 )–H bond functionalization is described. Using aryldiazonium salts realizes carbonylation/azotization of pyrroles or indoles via polyhalomethyl-radical-mediated and electrophilic substitution, thus providing a green, efficient, and step-economy approach for synthesis of multifunctional pyrroles or indoles from the easily available substrates. Notably, this strategy relies on the use of aryldiazonium salts to extend the well-established iodine atom transfer to bromine or chlorine atom transfer.
Topics & Concepts
ChemistryHalogenElectrophileSalt (chemistry)Combinatorial chemistryAtom (system on chip)BromineCarbonylationHalogenationChlorineCatalysisOrganic chemistryAlkylCarbon monoxideComputer scienceEmbedded systemCatalytic C–H Functionalization MethodsRadical Photochemical ReactionsOxidative Organic Chemistry Reactions