Potassium Iodide → 4-(3-Acetoxy-4-methylanilino)-6-methoxy-7-((1-methylbenzimidazol-2-yl)methoxy)quinazoline

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A mixture of 4-(3-acetoxy-4-methylanilino)-7-hydroxy-6-methoxyquinazoline hydrochloride (240 mg, 0.64 mmol), (prepared as described for the starting material in Example 1), potassium carbonate (310 mg, 2.25 mmol), potassium iodide (10 mg, 0.064 mmol) and 2-chloromethyl-1-methylbenzimidazole (153 mg, 0.7 mmol) in DMF (12 ml) was heated at 65° C. for 3 hours. Further 2-chloromethyl-1-methylbenzimidazole (90 mg, 0.41 mmol) and potassium carbonate (165 mg, 1.2 mmol) were added and heating continued for 2 hours. The solvent was removed by evaporation and the residue was partitioned between ethyl acetate and water. The organic layer was separated, washed with water and brine, dried (MgSO4) and the solvent removed by evaporation. The residue was triturated with water and the solid product collected by filtration, washed with ether and dried under vacuum to give 4-(3-acetoxy-4-methylanilino)-6-methoxy-7-((1-methylbenzoimidazol-2-yl)methoxy)quinazoline (292 mg, 95%).

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