Regiocontrolled Synthesis of Ethene-Bridged<i>para</i>-Phenylene Oligomers Based on Pt<sup>II</sup>- and Ru<sup>II</sup>-Catalyzed Aromatization
作者:Tse-An Chen、Te-Ju Lee、Ming-Yuan Lin、Shariar M. A. Sohel、Eric Wei-Guang Diau、Shie-Fu Lush、Rai-Shung Liu
DOI:10.1002/chem.200902231
日期:2010.2.8
We report the regiocontrolled syntheses of ethene‐bridged para‐phenylene oligomers in three distinct classes by using PtII‐ and RuII‐catalyzed aromatization. This synthetic approach has been developed based on twofold aromatization of the 1‐aryl‐2‐alkynylbenzene functionality, which proceeds by distinct regioselectivity for platinum and ruthenium catalysts. Variable‐temperature NMR spectra provide