US 11,884,677 B1
5-(substitutedphenyl)-7-imino-7,8-dihydropyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione analogues as anti-inflammatory agents
Katharigatta N. Venugopala, Al-Ahsa (SA); Pran Kishore Deb, Ranchi (IN); Vinuta Kamat, Mangalagangothri (IN); Rangappa Santosh, Mangalagangothri (IN); Boja Poojary, Mangalagangothri (IN); Manohar S. Kugaji, Belagavi (IN); Vijay M. Kumbar, Belagavi (IN); Mohamed A. Morsy, Al-Ahsa (SA); Bandar Aldhubiab, Al-Ahsa (SA); Mahesh Attimarad, Al-Ahsa (SA); Anroop B. Nair, Al-Ahsa (SA); and Nagaraja Sreeharsha, Al-Ahsa (SA)
Assigned to KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed by KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed on Aug. 9, 2023, as Appl. No. 18/232,182.
Int. Cl. C07D 487/04 (2006.01); A61P 29/00 (2006.01)
CPC C07D 487/04 (2013.01) [A61P 29/00 (2018.01)] 14 Claims
 
1. A compound having the formula 4:

OG Complex Work Unit Chemistry
or a pharmaceutically acceptable salt, ester, stereoisomer, or solvate thereof, wherein:
R1 is selected from the group consisting of hydrogen, hydroxy, and benzyloxy;
R2 is selected from the group consisting of hydrogen, a C1-C6 straight or branched chain alkoxy, and benzyloxy;
R3 is selected from the group consisting of hydrogen and a C1-C6 straight or branched chain alkyl; and
R4 is selected from the group consisting of hydrogen and a C1-C6 straight or branched chain alkyl.