反应详情

To a stirred solution of 2-(3-methoxyphenyl)-1-phenylethanone (1.25 g, 5.52 mmol) in THF (11.05 mL) was added potassium tert-butoxide (11.49 mL, 11.49 mmol). After 30 min, CS2 (0.363 mL, 6.02 mmol) was added and the mixture was stirred for 10 min before 2-(2-bromoethoxy)tetrahydro-2H-pyran (2.086 mL, 13.81 mmol) was added and the reaction was stirred overnight. The mixture was diluted with ethanol (11.05 mL). Acetic acid (1.898 mL, 33.1 mmol) was added followed by hydrazine hydrate (2.71 mL, 55.2 mmol). The reaction was stirred at 85° C. overnight and concentrated under reduced pressure. The residue was extracted with EtOAc/H2O (twice). The organic phases were combined and washed with brine, dried over MgSO4 and concentrated. The residue was purified by silica gel column chromatography to give the title compound as a white solid (1.681 g). 1H NMR (400 MHz, CDCl3) δ ppm 1.52-1.64 (m, 3H), 1.65-1.93 (m, 3H), 3.06 (t, J=5.94 Hz, 2H), 3.49-3.57 (m, 1H), 3.65-3.71 (m, 1H), 3.72 (s, 3H), 3.88-3.95 (m, 1H), 3.97-4.05 (m, 1H), 4.66-4.69 (m, 1H), 6.79-6.90 (m, 3H), 7.19-7.26 (m, 1H), 7.26-7.33 (m, 3H), 7.37-7.45 (m, 2H), 10.91 (bs, 1H).

1. additionwas added
2. stirringThe reaction was stirred at 85° C. overnight
3. concentrationconcentrated under reduced pressure
4. extractionThe residue was extracted with EtOAc/H2O (twice)
5. washwashed with brine
6. dry with materialdried over MgSO4
7. concentrationconcentrated
8. customThe residue was purified by silica gel column chromatography