Yl. Wang et al., USING N-BROMOSUCCINIMIDE AND PYRIDINE AS THE OXIDATION SYSTEM TO PREPARE CARBONYL AND ARYL AZO-COMPOUNDS, Synthetic communications, 27(10), 1997, pp. 1737-1742
Using N-bromosuccinimide and pyridine as the oxidation system to dehyd
rogenate aryl substituted semicarbazide or carbazide to form azo compo
unds in one phase is described first time in this paper. Nineteen azo
compounds have been prepared in excellent yield under mild condition.
This method only needs simple instrument and short reaction time.