Synthesis of 1-aryl indoles via coupling reaction of indoles and aryl halides catalyzed by CuI/metformin
作者:Hu Chen、Min Lei、Lihong Hu
DOI:10.1016/j.tet.2014.06.080
日期:2014.9
Ullmann-type C-N coupling reaction has been developed for the synthesis of 1-aryl indole derivatives by indoles and aryl halides in the presence of CuI/metformin (CuI/Met) in DMF. This method is very easy, rapid, and high yielding reaction for the synthesis of 1-aryl indoles. In particular, the metformin, which is used as ligand, is inexpensive and nontoxic that is considered to be relatively environmentally benign. (C) 2014 Elsevier Ltd. All rights reserved.
Copper-Catalyzed N-Arylation of Amines/Amides in Poly(ethylene glycol) as Recyclable Solvent Medium
The Buchwald N-arylation of amines and amides is achieved efficiently in PEG (400 Daltons) as solvent medium. The solvent and catalyst recyclability is studied. Interestingly amides underwent N-arylation with better yields.