反应详情

温度

80 °C

To 6-vinyl-3,4-dihydronaphthalen-1(2H)-one (Intermediate I-1B, 1.6 g, 9.29 mmol) in methanol (10 mL) was sequentially added hydroxylamine hydrochloride (0.775 g, 11.15 mmol) and sodium acetate (0.915 g, 11.15 mmol). The reaction mixture was heated at 80° C. (oil bath temp.) for 1.5 h. The reaction mixture was concentrated under reduced pressure and to the residue was added water (30 mL). The contents were triturated and filtered. The solid material was washed with water (2×20 mL) and dried overnight to yield 6-vinyl-3,4-dihydronaphthalen-1(2H)-one oxime (1.2 g, 6.41 mmol, 69.0% yield) as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 1.81-1.94 (m, 2H) 2.71-2.87 (m, 4H) 5.23-5.32 (m, 1H) 5.78 (dd, J=17.61, 0.88 Hz, 1H) 6.69 (dd, J=17.61, 10.78 Hz, 1H) 7.18 (s, 1H) 7.28 (s, 1H) 7.85 (d, J=8.14 Hz, 1H) 8.23 (br. s., 1H).

1. concentrationThe reaction mixture was concentrated under reduced pressure and to the residue
2. additionwas added water (30 mL)
3. customThe contents were triturated
4. filtrationfiltered
5. washThe solid material was washed with water (2×20 mL)
6. customdried overnight