Table 1 NMR data for DKPs 1 – 4 in CDCl3 (multi, J, Hz).
Carbon No | DKP-1 | DKP-2 | DKP-3 | DKP-4 | ||||
|---|---|---|---|---|---|---|---|---|
δH | δC | δH | δC | δH | δC | δH | δC | |
1 | 4.02, dd (7) | 53.4 | 3.87 (s) | 60.4 | 4.20, dd (10.5, 3) | 56.1 | 4.20, dd (3.5, 11.5) | 56.2 |
OH | 4.15, dd (9.5, 2.5) | |||||||
NH | 6.21 (s) | 6.19 (s) | 5.57 (s) | 5.93 (s) | ||||
2 | 166.2 | 164.9 | 165.0 | 165.2 | ||||
3 | 4.13, t (8.0) | 58.9 | 4.01, app t, (8) | 58.8 | 4.01, t (7.5) | 59.1 | 4.0, td (5.5, 7.5) | 59.1 |
4 | 170.2 | 170.1 | 169.3 | 169.7 | ||||
5 | 2.33, 2.37, m | 28.1 | 2.28, 2.33, m | 28.4 | 1.93, 1.96, 2.24, 2.29, m | 28.3 | 1.96, 2.27, m | 28.3 |
6 | 2.02, 2.18, m | 24.6 | 1.93, 2.02, m | 22.3 | 1.18, 1.85, m | 22.5 | 1.89, m | 22.4 |
7 | 3.52, 3.64, m | 45.5 | 3.49, 3.60, m | 45.1 | 3.59, m | 45.4 | 3.50, 3.59, m | 45.4 |
8 | 1.17, 1.82, 1.88, 1.94, m | 38.6 | 1.17, 1.88, 1.93, 2.02, m | 28.5 | 2.71, dd (14.5, 10.5) | 36.8 | 2.71, dd (14.5, 9.5), 3.37, dd (14.5, 4) | 35.9 |
9 | 1.54, ddd (14.5, 9.5, 5) | 23.2 | 2.54, ddd (2.5) | 19.1 | 126.8 | |||
10 | 1.01, d (6.5) | 22.7 | 1.01, d (7) | 19.0 | 6.97, d (8.5 H10,10′) | 130.3 | ||
11 | 0.96, d (6.5) | 21.2 | 0.84, d (7) | 6.70, d (8.5 H11,11′) | 116.1 | |||
12 | 155.7 | |||||||
Ph | 7.15–7.30 | 127.5, 129.1, 129.2, 135.9 | ||||||
