P-Xylene → N-(3-(3-methoxy-5-nitrophenylamino)quinoxalin-2-yl)-3-nitrobenzenesulfonamide

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N-(3-chloroquinoxalin-2-yl)-3-nitrobenzenesulfonamide (700 mg, 1.92 mmol), 3-methoxy-5-nitroaniline (645 mg, 3.84 mmol) and p-xylene (7 mL) were combined and heated to 140° C., then stirred for 16 hours at 130° C. The reaction was allowed to cool, placed in a sep. funnel, diluted with DCM, and washed with 2M HCl and brine and concentrated in vacuo. The resulting solid was washed with Et2O to give N-(3-(3-methoxy-5-nitro-phenylamino)quinoxalin-2-yl)-3-nitrobenzenesulfonamide (400 mg, 42%). MS (EI) m/z for C21H16N6O7S: 496.94 (MH+).

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