arylation of allylic and benzylic alcohols with diaryliodoniumsalts is reported. The reaction yields alkyl aryl ethers under mild and metal-free conditions. Phenols are arylated to diaryl ethers in good to excellent yields. The reaction employs diaryliodoniumsalts and sodium hydroxide in water at low temperature, and excess amounts of the coupling partners are avoided.
are demonstrated as efficient arylating agents of aliphaticalcohols under metal‐free conditions. The reaction proceeds at roomtemperature within 90 min to give alkyl aryl ethers in good to excellent yields. Aryl groups with electron‐withdrawing substituents are transferred most efficiently, and unsymmetric iodonium salts give chemoselective arylations. The methodology has been applied to the formal
Tsuji–Trost allylations with palladium recovery by phosphines/Pd(0)-triolefinic macrocyclic catalysts
作者:Anna Serra-Muns、Roser Pleixats
DOI:10.1016/j.jorganchem.2010.01.033
日期:2010.4
The allylation of several nitrogen and oxygen based nucleophiles with ethyl cinnamyl carbonate under mild conditions is described. The processes take place in the absence of added base and in the presence of the precatalytic system Pd(0)-triolefinic macrocycle/1,1'-bis(diphenylphosphino) ferrocene. The macrocyclic ligand plays a key role in the recovery of the metal in the form of the initial macrocyclic complex. (C) 2010 Elsevier B.V. All rights reserved.
Enantioselective and Regioselective Ruthenium‐Catalyzed Decarboxylative Etherification of Allyl Aryl Carbonates