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Table 1 1D and 2D NMR spectroscopic data (and assignments) obtained from sesquiterpene 7 and 1D NMR data for 10-bromo-7,8-expoxychamigr-1-en-3-ol (8)[26]

From: Cytotoxic compounds from Laurencia pacifica

Position δC,a typeb δH(H, multi, J Hz) 1H- 1H COSY HMBC δCc δH (multi, J Hz)
1 136.4, CH 5.84 (1H, d, 10.4) 2 6 136.1 5.84 (dd, 10.4, 1.0)
2 131.1, CH 5.53 (1H, d, 10.4) 1 3, 6, 15 131.3 5.73 (dd, 10.4, 1.6)
3 67.5, q C - - - 66.8 -
4 36.1, CH2 1.80 (1H, m), 1.73 (1H, m) 5 3 35.0 1.79 (m), 1.81 (m)
5 28.2, CH2 1.98 (2H, m) 4 3, 6 23.1 1.69 (ddd, 13.2, 11.2, 4.7), 1.94 (d, 13.2)
6 48.0, q C - - - 45.9 -
7 139.0, q C - - - 60.5 -
8 120.2, CH 5.22 (1H, s) 9, 14 - 61.4 2.97 (d, 3.0)
9 35.8, CH2 2.78 (1H, m), 2.56 (1H, m) 8, 10 - 35.1 2.40 (ddd, 15.4, 11.4, 3.0), 2.69 (dd, 15.4, 5.8)
10 62.0, CH 4.63 (1H, dd, 10.8, 6.3) 9b 12 58.4 4.28 (dd, 11.4, 5.8)
11 41.5, q C - - - 40.0 -
12 17.8, CH3 1.01 (3H, s) 13 13 18.2 1.08 (s)
13 26.1, CH3 1.10 (3H, s) 12 6, 10, 12 25.8 0.98 (s)
14 21.7, CH3 1.55 (3H, s) 9   26.0 1.17 (s)
15 28.6, CH3 1.29 (3H, bs) -   29.3 1.33 (s)
  1. aData recorded in CDCl3 calibrated at δH 7.24 ppm an for δc 77.0 for residual solvent; bin the case of a diasterotopic pair of hydrogens, `a´ denotes the downfield proton while `b´ denotes the up field proton; cchemical shift for the carbons was inferred from HSQC and HMBC data.