反应详情

Combined (+/−)-3-Azido-1-ethyl-6-methoxy-7-nitro-1,3,4,5-tetrahydro-benzo[b]azepin-2-one (280 mg), Triphenylphosphine Resin (1.0 mmol/g loading; 1.83 g,), Tetrahydrofuran (25 mL) and Water (0.25 mL) and stir at rt overnight. Filter and concentrate. Strip down from benzene to remove water. (+/−)-3-Amino-1-ethyl-6-methoxy-7-nitro-1,3,4,5-tetrahydro-benzo[b]azepin-2-one as an orangish oil isolated (251 mgs). 1H-NMR (CDCl3, 400 MHz): 7.84 (d, J=8.8 Hz, 1H), 7.10 (d, J=8.9 Hz, 1H), 4.36-4.28 (m, 1H), 3.97 (s, 3H), 3.71-3.62 (m, 1H), 3.36-3.31 (m, 1H), 3.23-3.18 (m, 1H), 2.52-2.39 (m, 2H), 2.03-1.99 (m, 1H), 1.66 (broad s, 2H), 1.21 (t, J=7.3 Hz, 3H). LC/MS: (M+H)+ found 280.18.

1. filtrationFilter
2. concentrationconcentrate
3. customStrip down from benzene to remove water