Cl[C:2]1[C:11]2[C:6](=[CH:7][C:8]([O:14][CH3:15])=[C:9]([O:12][CH3:13])[CH:10]=2)[N:5]=[CH:4][N:3]=1.[C:16]([C:20]1[Se:24][C:23]([C:25]([NH2:27])=[O:26])=[C:22]([OH:28])[CH:21]=1)([CH3:19])([CH3:18])[CH3:17].[OH-].[Na+].Cl>CN(C=O)C.O>[CH3:13][O:12][C:9]1[CH:10]=[C:11]2[C:6](=[CH:7][C:8]=1[O:14][CH3:15])[N:5]=[CH:4][N:3]=[C:2]2[O:28][C:22]1[CH:21]=[C:20]([C:16]([CH3:19])([CH3:17])[CH3:18])[Se:24][C:23]=1[C:25]([NH2:27])=[O:26]
To a solution of 4-chloro-6,7-dimethoxyquinazoline (200 mg, 0.89 mmol) in DMF (5 mL) was added sequentially 5-tert-butyl-3-hydroxyselenophene-2-carboxamide (220 mg, 0.89 mmol), powdered NaOH (147 mg, 3.568 mmol) and catalytic amount of KI at rt and the mixture was stirred at rt for 3 h. The mixture was poured into ice cooled water, neutralized with dil. HCl and stirred for 15 min. The precipitated solid was filtered, washed with water and dried. The crude product was chromatographed over silica gel column using chloroform-methanol (95:5) as eluents to give the product as an yellow color solid (245 mg, 63%), mp 220-224° C. 1H NMR (400 MHz, CDCl3): δ 15.16 (1H, br s, exchangeable with D2O), 13.63 (1H, br s, exchangeable with D2O), 8.17 (1H, s), 7.51 (1H, s), 7.21 (1H, s), 6.87 (1H, s), 4.05 (6H, s), 1.38 (9H, s); 13C NMR (100 MHz, CDCl3): δ 175.5, 172.0, 164.8, 156.6. 155.1, 150.7, 145.9, 139.9, 118.7, 113.1, 112.7, 108.4, 103.3, 56.5, 56.3, 37.1, 32.2; LC-MS (positive ion mode): m/z 434, 436 (M+H)+.
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