Oxidant-controlled regioselectivity in the oxidative arylation of N-acetylindoles
作者:Shathaverdhan Potavathri、Ashley S. Dumas、Timothy A. Dwight、Gregory R. Naumiec、Jeffrey M. Hammann、Brenton DeBoef
DOI:10.1016/j.tetlet.2008.04.073
日期:2008.6
N-Acetylindoles can be oxidatively coupled with arenes such as benzene or pentafluorobenzene in dioxane. The use of Cu(OAc)(2) as the stoichiometric oxidant produces selective arylation at the 3-position of indole while AgOAc produces selective arylation at indole's 2-position. (C) 2008 Elsevier Ltd. All rights reserved.
PtCl4-catalyzed cyclization of N-acetyl-2-alkynylanilines: A mild and efficient synthesis of N-acetyl-2-substituted indoles
An efficient synthesis of N-acetyl-2-substituted indole derivatives via direct intramolecular hydroamination of N-acetyl-2-alkynylaniline derivatives was developed. The reaction could be applied to a wide range of substrates employing only 1–2 mol% of PtCl4 as the catalyst to furnish the desired indole products in moderate to excellent yields. The current protocol is efficient, reliable and scalable