New persubstituted 1,3,5-trisethynyl benzenes via Sonogashira coupling
作者:Gunther Hennrich、Antonio M Echavarren
DOI:10.1016/j.tetlet.2003.12.011
日期:2004.2
Starting from 1,3,5-trifluoro-2,4,6-triiodobenzene, selective Sonogashira coupling gave trisalkynylbenzenes, which can be further functionalized making use of the reactive fluorine substituents on the benzene core. Along the way, a conceivably trivial deprotection step unexpectedly led to a pentasubstituted benzene derivative the structure of which was revealed by X-ray crystallography. (C) 2003 Elsevier Ltd. All rights reserved.