[CH3:1][O:2][CH2:3][CH2:4][CH2:5][O:6][C:7]1[CH:12]=[CH:11][CH:10]=[C:9]([N+:13]([O-])=O)[CH:8]=1.O.O.[Sn](Cl)(Cl)(Cl)Cl.C(N(CC)CC)C>C(OCC)(=O)C>[CH3:1][O:2][CH2:3][CH2:4][CH2:5][O:6][C:7]1[CH:8]=[C:9]([CH:10]=[CH:11][CH:12]=1)[NH2:13]1-(3-methoxypropoxy)-3-nitrobenzene (10A) (2.0 g, 11.84 mmol) and tin chloride dihydrate (13.36 g, 59.18 mmol) in 25 mL of ethyl acetate was combined. The mixture was heated at 60° C. for about two hours. The reaction was then chilled at 0° C. Triethylamine (25-30 mL) was added slowly until a white precipitate formed. The white precipitate was filtered over a Celite plug, washed with brine, and then dried over MgSO4. The dried filtrate was then concentrated in vacuo and dried under vacuum to provide 10B (2.0 g, 93%). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.90 (q, J=6.32 Hz, 2H) 3.24 (s, 3 H) 3.44 (t, J=6.32 Hz, 2H) 3.89 (t, J=6.44 Hz, 2H) 5.02 (br. s., 2H) 6.05 (dd, J=8.08, 1.26 Hz, 1H) 6.11-6.14 (m, 2H) 6.87 (t, J=8.21 Hz, 1H). ESI-MS: m/z 182.3 (M+H)+.
Wird geladen…
