HCID 178418361, compound → 1-Aminoanthraquinone

Participants

Reaction Conditions

Reaction Steps

To 100 parts of ethyleneglycol monomethyl ether (so called methyl-Cellosolve) there were added 5.0 parts of 1-hydroxylaminoanthraquinone and 0.25 part of Raney nickel. The reaction mixture was heated to 80°C over 30 minutes and maintained at 80°C for 4 hours, with stirring, while introducing thereinto 0.04 parts/hour of gaseous hydrogen. The reaction mixture was then purged of gaseous hydrogen with gaseous nitrogen, heated to 100°C and filtered while hot to separate the catalyst as residue. The filtrate was, while maintained at 80°C, added with 100 parts of water, with stirring, to precipitate crystals. The slurry thus formed was then cooled to room temperature and filtered. The residue was washed with 5 parts of methanol and dried to obtain 4.2 parts of 1-aminoanthraquinone of a purity of 97 %. In the filtrate there remained 0.1 part of 1-aminoanthraquinone dissolved.

Provenance & Evidence