Cu(I) mediated one-pot synthesis of azobenzenes from bis-Boc aryl hydrazines and aryl halides
作者:Kyu-Young Kim、Jeong-Taek Shin、Kang-Sang Lee、Cheon-Gyu Cho
DOI:10.1016/j.tetlet.2003.10.091
日期:2004.1
N,N′-bis-Boc aryl hydrazines underwent Cu(I) catalyzed couplings with aryl halides to provide N,N′-bis-Boc diaryl hydrazines. The resulting N,N′-bis-Boc diaryl hydrazines are readily oxidized to the azobenzenes in the presence of Cu(I) and a base. A prolonged heating of the initial coupling reactions directly provides the corresponding azobenzenes in one pot.
Ñ,Ñ ' -双-芳基的Boc肼后行的Cu(I)与芳基卤化物催化的偶合,以提供Ñ,Ñ ' -双-二芳基的Boc肼。将所得Ñ,Ñ ' -双-二芳基酯的Boc肼容易被氧化,以在Cu中(I)的存在下,偶氮苯和碱。长时间加热初始偶联反应可在一个锅中直接提供相应的偶氮苯。