Efficient Synthesis of <i>N</i>-Aryl-Aza-Crown Ethers via Palladium-Catalyzed Amination
作者:Xiao-Xiang Zhang、Stephen L. Buchwald
DOI:10.1021/jo005577d
日期:2000.11.1
N-Aryl-aza-crown ethers were efficiently prepared by reaction of an aza-crown ether with an aryl bromide via a palladium-catalyzedamination. The combination of Pd(2)(dba)(3) and a biphenyl-based electron-rich bulky monophosphine is effective for catalyzing the coupling of 1-aza-15-crown-5 with both electron-deficient and electron-rich aryl bromides under mild conditions. N-Aryl-aza-crown ethers were