(E)-Ethyl 5-morpholinohex-2-enoate 9. 1H NMR (500 MHz, CDCl3-CCl4, ~1 : 1), δ (ppm): 1.01 (d, 3H, J6,5 = 6.6 Hz, C6H3), 1.28 (t, 3H, J8,7 = 7.1 Hz, C8H3), 2.15 (dddd, 1H, 2J = 14.3 Hz, J4,3 = 7.9 Hz, J4,5 = 7.9 Hz, J4,2 = 1.3 Hz, H4), 2.44 (dddd, 1H, 2J = 14.3 Hz, J4',3 = 6.8 Hz, J4',5 = 5.6 Hz, J4',2 = 1.3, H4'), 2.45-2.53 (m, 4H, C9H2, C12H2), 2.66 (dqd, 1H, J5,4 = 7.9 Hz, J5,6 = 6.6 Hz, J5,4' = 5.6 Hz, H5), 3.60-3.68 (m, 4H, C10H2, C11H2), 4.16 (q, 2H, J7,8 = 7.1 Hz, H7), 5.79 (ddd, 1H, J2,3 = 15.6 Hz, J2,4' = 1.7 Hz, J2,4 = 1.3 Hz, H2), 6.91 (ddd, 1H, J3,2 = 15.6 Hz, J3,4 = 7.9 Hz, J3,4' = 6.8 Hz, H3); 13C NMR (500 MHz, CDCl3-CCl4, ~1 : 1), δ (ppm): 165.99 (s, C1), 122.74 (d, C2), 146.64 (d, C3), 35.93 (t, C4), 58.85 (d, C5), 14.83 (q, C6), 59.97 (t, C7), 14.36 (q, C8), 48.93 (t, C9, C12), 67.15 (t, C10, C11);
API-ES MS found: [М + H+]228.1590. C12H21NHO3. Calc.: [М + H+]228.1594.
核磁共振C谱中的d, t, q峰是怎样得到的?
文章中写道:The signal multiplicity in the 13C NMR spectra was determined from the J modulation (JMOD) or proton off-resonance suppression spectra.
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本帖最后由 kendytian 于 2010-9-30 17:52 编辑 ]