The reaction of o-phenylene diamine and ethyl oxamate is reinvestigated and led to 3- aminoquinoxalin-2 (1H)-one rather than benzimidazole-2-carboxamide as was previously reported. The structure of the obtained quinoxaline has been confirmed by X-ray. The anti- tumor activity of synthesized quinoxalines 1–21 has been evaluated by studying their possible inhibitory effects on Epstein–Barr virus early antigen (EBV-EA) activation induced ...
[Omar, Mohamed A.; Shaker, Yasser M.; Galal, Shadia A.; Ali, Mamdouh M.; Kerwin, Sean M.; Li, Jing; Tokuda, Harukuni; Ramadan, Raghda A.; El Diwani, Hoda I. Bioorganic and Medicinal Chemistry, 2012 , vol. 20, # 24 p. 6989 - 7001]