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.
![tert-butyl N-[(2-methylpropan-2-yl)oxycarbonylamino]-N-phenylcarbamate Structure](https://image.chemsrc.com/caspic/123/65578-58-7.png)
