反应详情

Combine 6-Methoxy-5-nitro-2,3,4,4a,10,10a-hexahydro-1H-phenanthren-9-one (0.377 g, 1.37 mmol), 4-bromoanisole (0.258 g, 1.37 mmol), palladium acetate (15.5 mg, 0.07 mmol), t-butyl phosphine (0.042 g, 0.208 mmol), sodium t-butoxide (0.145 g, 1.51 mmol), tetrahydrofuran (12.0 mL), and stir under nitrogen atmosphere at 80° C. in a glass bomb. After 18 hours, quench reaction with acetic acid (5 mL) in a glove box and extract with ethyl acetate. Wash the ethyl acetate with sodium bicarbonate solution and then brine, dry over sodium sulfate, and concentrate in vacuum. Flash chromatograph using 0% to 20% ethyl acetate/hexanes to yield the titled compound (0.455 g, 87%) as a yellow foam. TLC Rf=0.16 in 6:1 hexanes:ethyl acetate. 1H NMR (CDCl3): 8.23 (d, 1H, J=8.8 Hz), 7.06 (m, 3H), 6.92 (m, 2H), 4.01 (m, 4H), 3.83 (s, 3H), 3.10 (dt, 1H, J=8.4, 4.3 Hz), 2.76 (m, 1H), 1.82 (m, 4H), 1.47 (m, 4H).

1. customquench
2. customreaction with acetic acid (5 mL) in a glove box
3. extractionextract with ethyl acetate
4. washWash the ethyl acetate with sodium bicarbonate solution
5. dry with materialbrine, dry over sodium sulfate
6. concentrationconcentrate in vacuum