US 12,221,451 B1
Diorganyl diselenide-clubbed quaternary purines as corrosion inhibitors
Saadeldin Elsayed Ibrahim Shabaan, Al-Ahsa (SA); Hany Mohamed Abd El-Lateef Ahmed, Al-Ahsa (SA); Tarek Ahmed Yousef, Riyadh (SA); and Ahmed S. M. Aljanabi, Al-Ahsa (SA)
Assigned to KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed by KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed on Jan. 29, 2024, as Appl. No. 18/425,585.
Application 18/425,585 is a division of application No. 18/242,081, filed on Sep. 5, 2023.
Int. Cl. C07D 487/14 (2006.01); C09D 5/08 (2006.01); C09D 7/63 (2018.01); C23F 11/14 (2006.01)
CPC C07D 487/14 (2013.01) [C09D 5/086 (2013.01); C09D 7/63 (2018.01); C23F 11/149 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of making a diorganyl diselenide-clubbed quaternary purine having a formula I:

OG Complex Work Unit Chemistry
wherein:
R1 and R2 are independently selected from the group consisting of C2-C3 alkyl and

OG Complex Work Unit Chemistry
R3 is selected from the group consisting of H, COOMe, and COOEt, and
R4 is selected from the group consisting of hydrogen, 4-NO2—C6H4, 4-F2—C6H4, and 4-MeO—C6H4;
the method comprising:
combining a guanine base, benzaldehyde, and dimethylsulfoxide (DMSO) to provide a solution;
adding methyl iodide to the solution; and
adding zirconium (IV) chloride and a diselenide compound to the solution to provide the diorganyl diselenide-clubbed quaternary purine in the solution.