A suspension of 4-chloro-7-hydroxy-6-methoxyquinazoline (202 mg, 0.96 mmol), (prepared as described for the starting material in Example 4), in methylene chloride (10 ml) was treated with triphenylphosphine (352 mg, 1.35 mmol), 3-[4-(2-fluoroethyl)piperazin-1-yl)propan-1-ol (200 mg, 1.06 mmol), (prepared as described for the starting material in Example 27), and diisopropyl azodicarboxylate (226 mg, 1.15 mmol) and the mixture stirred at ambient temperature for 2 hours. The crude reaction mixture was loaded onto a silica column and eluted using methylene chloride/methanol (95/5). The relevant fractions were combined and evaporated under vacuum to give 4-chloro-7-{3-[4-(2-fluoroethyl)piperazin-1-yl]propoxy}-6-methoxyquinazoline (208 mg, 57%) as a white solid.
