反应详情

温度

60 °C

A mixture of 2-[4-(6,7-dimethoxyquinazolin-4-yloxy)phenyl]acetic acid (0.3 g) and oxalyl chloride (3.73 ml) was heated at 60° C. for 30 minutes. The excess of oxalyl chloride was evaporated. Pyridine (0.43 ml) was added to a stirred mixture of the 2-[4-(6,7-dimethoxyquinazolin-4-yloxy)phenyl]acetyl chloride so obtained, 5-amino-3-isopropylisoxazole (0.148 g) and methylene chloride (30 ml). The resultant mixture was stirred at ambient temperature for 30 minutes. The mixture was evaporated and the residue was purified by column chromatography on silica using increasingly polar mixtures of methylene chloride and ethyl acetate as eluent. There was thus obtained the title compound (0.183 g); 1H NMR: (DMSOd6) 1.89 (d, 6H), 2.92 (m, 1H), 3.75 (s, 2H), 3.97 (s, 3H), 4.0 (s, 3H), 6.18 (s, 1H), 7.26 (d, 2H), 7.39 (s, 1H), 7.41 (d, 2H), 7.55 (s, 1H), 8.53 (s, 1H), 11.83 (br s, 1H); Mass Spectrum: M+H+ 449.

1. customThe excess of oxalyl chloride was evaporated
2. additionPyridine (0.43 ml) was added to a stirred mixture of the 2-[4-(6,7-dimethoxyquinazolin-4-yloxy)phenyl]acetyl chloride
3. customso obtained
4. customThe mixture was evaporated
5. customthe residue was purified by column chromatography on silica using
6. temperatureincreasingly polar mixtures of methylene chloride and ethyl acetate as eluent