[NH2:1][C:2]1[CH:3]=[C:4]([NH:10][S:11]([CH3:14])(=[O:13])=[O:12])[CH:5]=[C:6]([O:8][CH3:9])[CH:7]=1.C(N(CC)CC)C.[Cl:22][C:23]1[C:28]([C:29](Cl)=[O:30])=[C:27]([Cl:32])[N:26]=[CH:25][N:24]=1>ClCCl>[Cl:22][C:23]1[C:28]([C:29]([NH:1][C:2]2[CH:3]=[C:4]([NH:10][S:11]([CH3:14])(=[O:13])=[O:12])[CH:5]=[C:6]([O:8][CH3:9])[CH:7]=2)=[O:30])=[C:27]([Cl:32])[N:26]=[CH:25][N:24]=1N-(3-Amino-5-methoxyphenyl)methanesulfonamide (1 g, 87% purity, 4.02 mmol) was dissolved in dichloromethane (36 ml) and triethylamine (1.35 ml, 9.65 mmol) was added. Then a solution of 4,6-dichloropyrimidine-5-carbonyl chloride (1.52 g, 67% purity, 4.82 mmol, prepared according to E. V. Tarasov et al. Synlett 2000, 5, 625-626) was added dropwise and the reaction mixture was stirred at room temperature overnight. The reaction mixture was then diluted with dichloromethane, washed with 4% sodium bicarbonate solution, dried over magnesium sulphate, filtered and evaporated. The crude was purified by flash chromatography (0% to 40%, hexane-ethyl acetate) using an Isolera® Purification System to give 617 mg (28% yield) of the title compound as a reddish oil. Purity 73%.
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