Table 2.
1H and 13C NMR Data for 3 and 4 (500 and 125 MHz, DMSO-d6, δ in ppm).
| Position | 3 | 4 | ||
|---|---|---|---|---|
| δC, Type | δH, mult. (J in Hz) | δC, Type | δH mult. (J in Hz) | |
| 1 | 77.8, CH | 3.45, dd, (9.1, 2.5) | 77.5, CH | 3.40, d, (9.2) |
| 2 | 67.7, CH | 3.66, m | 67.3, CH | 3.60, m |
| 3 | 35.9, CH2 | 2.06, m | 35.0, CH2 | 1.93, m |
| 1.48, m | 1.40, m | |||
| 4 | 41.2, CH | 1.71, m | 40.5, CH | 1.67, m |
| 5 | 75.3, qC | 76.7, qC | ||
| 6 | 37.1, CH2 | 1.79, m | 38.7, CH2 | 1.99, d, (14.0) |
| 1.25, dd, (13.3, 3.0) | 1.15, d, (14.0) | |||
| 7 | 39.2, CH | 2.53, m | 75.1, qC | |
| 8 | 25.4, CH2 | 1.49, m | 30.3, CH2 | 1.46, m |
| 1.34, m | ||||
| 9 | 33.3, CH2 | 1.76, m | 29.8, CH2 | 1.76, m |
| 1.43, m | 1.40, m | |||
| 10 | 41.9, qC | 42.1, qC | ||
| 11 | 150.7, qC | 151.6, qC | ||
| 12 | 108.7, CH2 | 4.73, d, (1.6) | 109.3, CH2 | 4.96, s |
| 4.75, d, (1.6) | 4.74, s | |||
| 13 | 21.3, CH3 | 1.67, s | 19.0, CH3 | 1.74, s |
| 14 | 17.8, CH3 | 0.96, d, (7.8) | 17.4, CH3 | 0.95, d, (7.8) |
| 15 | 16.9, CH3 | 0.86, s | 16.7, CH3 | 0.87, s |
| 1-OH | 4.29, d, (3.7) | 4.26, br s | ||
| 2-OH | 4.37, d, (2.8) | 4.20, br s | ||
| 5-OH | 3.74, s | 5.66, s | ||
| 7-OH | 5.63 s | |||