A Novel Strategy for the Synthesis of Oxygenated Phenanthrenes Involving a Combination of Ullmann and McMurry Reactions
作者:Anne-Elisabeth Gies、Michel Pfeffer
DOI:10.1021/jo982522r
日期:1999.5.1
preparation of polyoxygenated phenanthrenes from substituted derivatives of benzaldehyde is described. The key compound is a 6,6'-biphenyl-1,1'-dicarboxaldehyde intermediate formed through an ambienttemperatureUllmanncoupling. The subsequent McMurry condensation gave rise to the phenanthrene in 45-57% yields.
The ambient temperature Ullmann reaction and its application to the total synthesis of (.+-.)-steganacin
作者:Frederick E. Ziegler、Irene Chliwner、Kerry W. Fowler、Sheldon J. Kanfer、Stephen J. Kuo、Nanda D. Sinha
DOI:10.1021/ja00522a058
日期:1980.1
Nickel-catalyzed Ullmann-type Coupling Reaction to Prepare Tetra-ortho-substituted Biaryls
作者:Ran Hong、Rob Hoen、Jing Zhang、Guo-qiang Lin
DOI:10.1055/s-2001-17488
日期:——
A nickel-catalyzed Ullmann-type reaction on the coupling of bis-ortho-substituted arylhalides to prepare tetra-ortho-biaryls was brought about in moderate to high yields. Bu4NI might function as an efficient bridging ligand to accelerate the formation of dinickel-center intermediate, which subsequently eliminates to desired coupling product.