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Tetrazole-1-acetic acid was identified as an efficient ligand to promote copper-catalyzed domino reaction of ortho-iodo/bromo-anilines with β-keto esters/β-diketone for 2,3-disubstituted indoles' synthesis with high yields under mild conditions. The protocol, with easy-available catalytic system, shows good substrate tolerance towards various functional groups.
Tetrazole-1-acetic acid was found to serve as a superior ligand for CuI-catalyzed N-arylation of imidazoles with aryl iodides under a low catalyst loading (5mol% of CuI). A variety of aryl iodides could be aminated to provide the N-arylated products in good to excellent yields without the need of an inert atmosphere.
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