Assignments of carbon and proton signals of M-2 and M-4
No. | Carbon Signals | Proton Signals | ||||
|---|---|---|---|---|---|---|
| M-2 | M-4 | M-2 | M-4 | |||
| 1 | 28.9 | 31.1 | 2.80 (2H, m) | 2.60 (1H, m); 2.70(1H, m) | ||
| 2 | 44.5 | 39.3 | 2.67 (2H, m) | 1.72 (2H, m) | ||
| 3 | 211.2 | 71.3 | 3.62 (1H, m) | |||
| 4 | 42.9 | 37.4 | 2.39 (2H, t, 6.8 Hz) | 1.49 (1H, m) | ||
| 5 | 23.3 | 25.2 | 1.57 (2H, m) | 1.35 (1H, m); 1.47 (1H, m) | ||
| 6 | 31.1 | 31.8 | 1.51 (2H, m) | 1.60 (2H, m) | ||
| 7 | 35.3 | 35.6 | 2.50 (2H, m) | 2.54 (2H, t, 7.6 Hz) | ||
| 1′ | 132.7 | 134.2 | ||||
| 2′, 6′ | 129.3 (2C) | 129.5 (2C) | 6.99 (2H, d, 8.4 Hz) | 7.05 (2H, d, 8.3 Hz) | ||
| 3′, 5′ | 115.3 (2C) | 115.2 (2C) | 6.74 (2H, d, 8.4 Hz) | 6.75 2H, d, 8.3 Hz) | ||
| 4′ | 154.1 | 153.7 | ||||
| 1″ | 134.2 | 134.6 | ||||
| 2″ | 111.0 | 110.9 | 6.64 (1H, d, 1.5 Hz) | 6.66 (1H, br.s) | ||
| 3″ | 146.3 | 146.3 | ||||
| 4″ | 143.5 | 143.5 | ||||
| 5″ | 114.1 | 114.1 | 6.81 (1H, d, 8.0 Hz) | 6.82 (1H, d, 7.7 Hz) | ||
| 6″ | 120.8 | 120.9 | 6.62 (1H, br.d, 8.0 Hz) | 6.66 (1H, br.d, 7.7 Hz) | ||
| −OCH3 | 55.8 | 55.9 | 3.84 (3H, s) | 3.87 (3H, s) | ||
All spectra were recorded on an AV-600 spectrometer, in CDCl3.
The carbon and proton signals were assigned unambiguously on 1H NMR, 13C NMR, HMQC, and HMBC.
m, multiplet.