反应详情

To a 35 ml round-bottomed flask equipped with condenser and N2 inlet were added 1.22 g (5.05 mmol) of 6-bromoethylbenzoxazolone, 1.08 g (5.05 mmol) of 4-piperazinylquinazoline, 0.85 g (8.0 mmol) of sodium carbonate, 2 mg of sodium iodide, and 35 ml of ethanol. The reaction was refluxed for 3 days, cooled, diluted with water, and the pH adjusted to 4 with 1N HCl. The aqueous layer was separated, the pH adjusted to 7 with 1N NaOH, and the product extracted into ethyl acetate. The ethyl acetate layer was washed with brine, dried, and evaporated to give 1.3 g of a yellow oil. The oil was crystallized form chloroform (1.1 g), dissolved in ethyl acetate, ethyl acetate saturated with HCl gas added, and the mixture concentrated to dryness. The residue gave 0.9 g (58%) of a yellow salt, m.p. 200° C. NMR (d, CDCl3): 2.72 (m, 6H), 2.86 (m, 2H), 3.83 (m, 4H), 6.9-7.9 (m, 7H), 8.72 (s, 1H).

1. customTo a 35 ml round-bottomed flask equipped with condenser and N2 inlet
2. temperatureThe reaction was refluxed for 3 days
3. temperaturecooled
4. customThe aqueous layer was separated
5. extractionthe product extracted into ethyl acetate
6. washThe ethyl acetate layer was washed with brine
7. customdried
8. customevaporated