A solution of 6-benzyloxy-4-(4-fluoro-2-methylindol-5-yloxy)-7-methoxyquinazoline (1.32 g, 3 mmol), ammonium formate (1.94 g, 30 mmol) and 10% palladium on carbon (0.2 g) in DMF (15 ml) containing water (2 ml) was stirred at ambient temperature for 1 hour. The mixture was filtered and the filtrate was evaporated. The residue was triturated under diethyl ether, filtered, washed with diethyl ether followed by water and dried under vacuum over P2O5 overnight to give 4-(4-fluoro-2-methylindol-5-yloxy)-6-hydroxy-7-methoxyquinazoline (1 g, 100%).
