Non-reductive conversion of 1-nitro-9,10-anthraquinone to 1-amino-9,10-anthraquinones

Article abstract of DOI:10.1016/0040-4039(94)88470-6

Heating 1-nitro-9,10-anthraquinone 2 with ureas 4 in N,N,N',N'-tetramethylurea (TMU) at around 130 °C resulted in the displacement of the nitro group by the amino groups, leading to the corresponding aminoanthraquinones 5 in good yields.