An efficient BINAM–copper(II) catalyzed Ullmann-type synthesis of diaryl ethers
作者:Ajay B. Naidu、O.R. Raghunath、D.J.C. Prasad、G. Sekar
DOI:10.1016/j.tetlet.2007.11.203
日期:2008.2
wide range of diarylethers are synthesized from the corresponding aryl iodides and phenols through Ullmann type coupling reactions in the presence of a catalytic amount of easily available BINAM–Cu(OTf)2 complex under mild reaction conditions. Less reactive aryl bromides have also been shown to react with phenols under identical reaction conditions to give good yields of the diarylethers without increasing
by copper(II) acetate mediated O‐arylationreaction of phenols using trivalent organobismuthanes. The reaction is performed under simple conditions and tolerates a wide diversity of functional groups on the phenol and on the organobismuthreagent. Substoichiometric amounts of catalyst can be used by performing the reaction under an oxygen atmosphere. The N‐arylation of pyridones is also reported.
General, Mild, and Intermolecular Ullmann-Type Synthesis of Diaryl and Alkyl Aryl Ethers Catalyzed by Diol−Copper(I) Complex
作者:Ajay B. Naidu、E. A. Jaseer、Govindasamy Sekar
DOI:10.1021/jo900438e
日期:2009.5.15
A wide range of diaryl ethers and alkylaryl ethers are synthesized through intermolecular C(aryl)−O bond formation from the corresponding aryl iodides/aryl bromides and phenols/alcohols through Ullmann-type coupling reaction in the presence of a catalytic amount of easily available (±)-diol L3-CuI complex under very mild reaction conditions. Less reactive aryl bromides can also be used for O-arylation