Palladium-catalyzed synthesis of N-aryl- and N-heteroaryl-aza-crown ethers via cross-coupling reactions of aryl- and heteroaryl bromides with aza-crown ethers
Palladium(0)-catalyzed cross-coupling reactions of electron deficient aryl- and heteroaryl bromides with aza-crown ethers of various ring sizes are described. The catalyst system Pd(OAc)(2)/PPh3 gave best results for cross coupling reactions of macrocyclic aza-crown ethers with electron poor aryl bromides.