New persubstituted 1,3,5-trisethynyl benzenes via Sonogashira coupling
摘要:
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.
The synthesis of a series of octopolar 1,3,5-tris(ethynylphenyl)benzenes via Sonogashira coupling is described, varying the substituents on both the central benzene core as well as the acetylenic periphery. In particular, systems bearing an electron-rich core and an electron-poor periphery are obtained that display advanced optical properties. The linear (by UV−vis and fluorescence spectroscopy) and
Co‐Crystal Formation of Partially Fluorinated 1,3,5‐Tris(phenylethynyl)benzenes
作者:Jan‐Henrik Weddeling、Paul Lukas Waltersmann、Beate Neumann、Hans‐Georg Stammler、Norbert W. Mitzel
DOI:10.1002/open.202100194
日期:2021.10
π-Stacking in co-crystals of fluorinated and non-fluorinated aryl units in 1,3,5-tris(phenylethynyl)benzenes have different preferences and give stacks of different stability.
and single‐crystal X‐ray diffraction techniques, we found both similarities and dissimilarities. We also found that diverse molecular 3‐D orientations were derived in their single crystals according to substituents on the molecules and that the emission properties in the solid state are dependent on their packing manners.
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.