作者:Kurosh Rad-Moghadam、Masoumeh Sharifi-Kiasaraie
DOI:10.1016/j.tet.2009.08.073
日期:2009.10
Two ionic liquids, N,N,N,N-tetramethylguanidinium trifluoroacetate (TMGT) and the unprecedented N,N,N,N-tetramethylguanidinium triflate (TMCTf), were used as catalyst solvents in condensations between indoles and arylaldehydes or 1,3-diketones providing a simple and efficient method for synthesis of bis(3-indolyl)methanes or casually 3-alkenylindoles due to stereoelectronic concerns of reactants. The ionic liquids are easily separated and reused for several times. (c) 2009 Elsevier Ltd. All rights reserved.