The challenges of developing sustainable methods of carbon-carbon bondformation remains a topic of considerable importance in synthetic chemistry. Capitalizing on the highly reactive nature of the nitrile imine 1,3-dipole, we have developed a novel metal-free coupling of this species with aryl boronic acids. Photochemical generation of a nitrile imine intermediate and trapping with a palette of boronic
An efficient transition-metal-free synthesis of 1H-indazoles from arylhydrazones with montmorillonite K-10 under O2 atmosphere
作者:Jin Yu、Jin Woo Lim、Su Yeon Kim、Jimin Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2015.01.183
日期:2015.3
An efficient transition-metal-free synthetic method of 1H-indazoles has been developed. The reaction of arylhydrazones in the presence of montmorillonite K-10 in 1,2-dichlorobenzene at 130 degrees C afforded 1Hindazoles in good yields most likely via a sequential intramolecular nucleophilic cyclization and an aerobic oxidation pathway. (C) 2015 Elsevier Ltd. All rights reserved.