Sodium hexamethyldisilazane (1M solution in THF; 0.626 ml) was added to a solution of 6-bromo-2,3-methylenedioxyaniline (0.135 g) in DMF (2 ml) and the mixture was stirred at ambient temperature for 30 minutes. A solution of 4-chloro-6-methoxy-7-(3-piperidinopropoxy)quinazoline (0.1 g) in DMF (3.5 ml) was added and the resultant mixture was stirred at ambient temperature for 3 hours. The reaction mixture was diluted with water and extracted with ethyl acetate (2×). The organic phase was washed with water and with brine, dried over magnesium sulphate and evaporated. The residue was purified by column chromatography on silica using an 80:17:3 mixture of methylene chloride, methanol and a saturated methanolic ammonia solution as eluent. There was thus obtained the title compound as a solid (0.045 g); NMR Spectrum: (DMSOd6 and CF3CO2D) 1.4 (m, 1H), 1.7 (m, 3H), 1.85 (m, 2H), 2.3 (m, 2H), 2.95 (m, 2H), 3.25 (m, 2H), 3.55 (m, 2H), 4.05 (s, 3H), 4.3 (m, 2H), 6.15 (s, 2H), 7.05 (d, 1H), 7.3 (d, 1H), 7.4 (s, 1H), 8.15 (s, 1H), 8.9 (s, 1H); Mass Spectrum: M+H+ 515 and 517; Elemental Analysis: Found C, 55.74; H, 5.30; N, 10.76. C24H27BrN4O4 requires C, 55.93; H, 5.28; N, 10.87%.
