Nitrobenzene → 1-n-Octylsulfonylamino-8-(1'-ethylhexanoylamino)anthraquinone

Participants

Reaction Steps

1-(n-octylsulfonylamino)-8-aminoanthraquinone (0.25g), 1-ethylhexanoyl chloride (0.5g) and nitrobenzene (5ml) were heated at reflux for 10 mins. After addition of methanol (10ml), the mixture was heated on a steam bath for a further 10 mins to destroy excess acid chloride. 0n evaporation of low-boiling material, the remaining liquid was diluted with toluene (100ml) and separated by chromatography on a silica gel column. Nitrobenzene eluted first, and the material eluted with a 50:50 mixture of toluene:ethyl acetate was collected. The solvent was evaporated and ethanol was added to the residue, which upon trituration afforded the product as a yellow solid.

Provenance & Evidence