Trifluoroacetic acid → HCID 21935994, compound

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A mixture of 7-[3-(4-tert-butoxycarbonylpiperazin-1-yl)propoxy]-4-(6-chloro-2,3-methylenedioxyanilino)-6-methoxyquinazoline (0.286 g), trifluoroacetic acid (0.5 ml) and methylene chloride (6 ml) was stirred at ambient temperature for 3 hours. The solvent was evaporated and the residue was partitioned between methylene chloride and a saturated aqueous sodium bicarbonate solution. The organic phase was washed with water and with brine, dried over magnesium sulphate and evaporated. The material so obtained was triturated under a 6M solution of hydrogen chloride in diethyl ether. There was thus obtained the title compound (0.205 g); NMR Spectrum: (DMSOd6 and CF3CO2D) 2.35 (m, 2H), 3.2–3.9 (m, 10H), 4.0 (s, 3H), 4.35 (m, 2H), 6.12 (s, 2H), 7.0 (s, 1H), 7.1 (s, 1H), 7.38 (s, 1H), 8.15 (s, 1H), 8.85 (s, 1H); Mass Spectrum: M+H+ 472 and 474

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