作者:Florent Huguenot、Clémence Delalande、Michel Vidal
DOI:10.1016/j.tetlet.2014.06.098
日期:2014.8
We present the first results of the intramolecular cyclization of propargyl ureas catalyzed by TBAF. Depending on the substituents close to the triple bond, imidazolone or methylene-imidazolidinone was obtained. The dual activation of the triple bond by interaction with TBAF via the cation-pi is thought to be responsible. (C) 2014 Elsevier Ltd. All rights reserved.