US 11,987,543 B1
8-(4-bromobenzylideneamino)naphthalene-1,3-disulfonic acid as an antioxidant compound
Hany Mohamed Abd El-Lateef Ahmed, Al-Ahsa (SA); Mai Mostafa Khalaf Ali, Al-Ahsa (SA); Antar Ahmed Abdelhamid Ahmed, Sohag (EG); and Amer A. Amer, Sohag (EG)
Assigned to KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed by KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed on Oct. 31, 2023, as Appl. No. 18/385,535.
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 309/47 (2006.01); A61P 39/06 (2006.01)
CPC C07C 309/47 (2013.01) [A61P 39/06 (2018.01)] 4 Claims
 
1. A method of making 8-(4-bromobenzylideneamino)naphthalene-1,3-disulfonic acid compound having the formula I:

OG Complex Work Unit Chemistry
the method comprising:
mixing 8-aminonaphthalene-1,3-disulfonic acid, 4-bromobenzaldehyde, and triethylamine (TEA) in ethanol to obtain solution;
irradiating the solution at 50° C., followed by cooling to room temperature to obtain a formed precipitate;
purifying the formed precipitate by filtering and recrystallization using ethanol; and
obtaining the 8-(4-bromobenzylideneamino)naphthalene-1,3-disulfonic acid compound.