反应详情

To a well stirred mixture of sodium periodate (1.76 g, 8.26 mmol) in pH 7 buffer (10 mL) and tetrahydrofuran (15 mL) was added 6-fluoro-2-(2-dimethylamino-vinyl)-3,4-dihydro-3-(2-methyl-pyridin-3-yl)-quinazolin-4-one (0.69 g, 2.12 mmol) all at once. The mixture warmed slightly to the touch and was stirred for 1 hour at ambient temperature. The reaction was concentrated at reduced pressure and the residue treated with a 1:2 mixture of water and chloroform. The tan solid was collected, washed well with water and chloroform and dried under a stream of nitrogen to afford 0.50 g (80%) of 6-fluoro-3,4-dihydro-3-(2-methyl-pyridin-3-yl)-quinazolin-4-one-2-carboxaldehyde as a 1:1 mixture of free aldehyde and hydrate which had: mp 175-177° C.; 1H NMR δ 9.46 (s, 0.5 H) [CHO], 8.53 (br s, 1 H), 8.10-8.07 (s, 0.5 H), 7.94-7.70 (m, 3.5 H), 7.39-7.32 (m, 1 H), 6.59 (br s, 0.5 H) [hydrate OH], 6.47 (br s, 0.5 H) [hydrate OH], 5.17 (s, 0.5 H) [hydrate methine CH], 2.20 (s, 3 H); APCI MS m/z=284.1 (P+1).

1. temperatureThe mixture warmed slightly to the touch
2. stirringwas stirred for 1 hour at ambient temperature
3. concentrationThe reaction was concentrated at reduced pressure
4. additionthe residue treated with a 1:2 mixture of water and chloroform
5. customThe tan solid was collected
6. washwashed well with water and chloroform
7. customdried under a stream of nitrogen