Sulfuric Acid → HCID 23283732, compound
Reaction equation
BrC1C=CC2C(=O)C3C(=CC=CC=3)C(=O)C=2C=1Br.[Br:19][C:20]1[CH:33]=[CH:32][C:31]2[C:30](=[O:34])[C:29]3[C:24](=[CH:25][C:26]([Br:35])=[CH:27][CH:28]=3)[C:23](=O)[C:22]=2[CH:21]=1.[Al].S(=O)(=O)(O)O>>[Br:19][C:20]1[CH:33]=[CH:32][C:31]2[C:30](=[O:34])[C:29]3[C:24]([CH2:23][C:22]=2[CH:21]=1)=[CH:25][C:26]([Br:35])=[CH:27][CH:28]=3Participants
5
Procedure
3,6-Dibromoanthrone, a tuned photoinitiator precursor, can be prepared by first producing 2,7-dibromoanthraquinone by the direct bromination of anthraquinone with elemental bromine under pressure at about 160° C. as described by Diehl, Chem. Ber, 11, 1878, p181. The dibromoanthraquinone is then reduced to the 3,6-dibromoanthrone with aluminum metal and sulfuric acid as described by R. Biehl, et al., J. Amer. Chem. Soc., 99(13), 1977, pp.4278-4286.