Table 2 NMR spectra of the peak 3 compound.
From: A novel pathway for the photooxidation of catechin in relation to its prooxidative activity
Position | δC, mult | δH, (int., mult., J in Hz) | 1H-1HCOSY | HMBC (H→C) |
|---|---|---|---|---|
Peak 3 (in CD 3 OD) | ||||
2 | 79.7, C | 5.32 (1H, d, 4.0) | H-3 | C-3, C-4, C-9, C-2’ |
3 | 66.3, CH | 4.38 (1H, ddd, 8.4, 4.0, 4.0) | H-2, H-4a, H-4b | C-1’ |
4 | 38.2, CH2 | a: 1.86 (1H, dd, 13.0, 4.0) b: 2.10 (1H, dd, 13.0, 8.8) | H-3 H-3 | C-3, C-9, C-10, C-6’ C-2, C-9, C-10 |
5 | 192.7, C | |||
6 | 82.6, CH | 5.39, 5.48 (weak) | C-7, C-10 | |
7 | 175.8, C | |||
8 | 98.5, CH | 5.40 (1H, s) | C-6, C-9, C-10 | |
9 | 173.8, C | |||
10 | 49.0, C | |||
1’ | 126.3, C | |||
2’ | 114.7, CH | 6.92 (1H, s) | C-2, C-3’, C-4’, C-6’ | |
3’ | 147.6, C | |||
4’ | 146.1, C | |||
5’ | 111.7, CH | 6.85 (1H, s) | C-10, C-1’, C-4’ | |
6’ | 127.5, C | |||
Peak 3 (in DMSO- d 6) | ||||
2 | 77.3, C | 5.26 (1H, d, 4.2) | H-3 | C-3, C-4, C-9, C-1’ C-2’ |
3 | 64.5, CH | 4.22 (1H, ddd, 8.7, 4.2, 4.0) | H-2, H-4a, H-4b | |
4 | 36.7, CH2 | a: 1.62 (1H, dd, 12.7, 4.0) b: 1.97 (1H, dd, 12.7, 8.7) | H-3 H-3 | C-5, C-10, C-6’ C-10, C-6’ |
5 | 175.9, C | |||
6 | 102.1, CH | 5.41 (1H, s) | C-5, C-10 | |
7 | 163.4, C | |||
8 | 98.4, CH | 5.19 (1H, s) | C-6, C-9, C-10 | |
9 | 169.5, C | |||
10 | 47.0, C | |||
1’ | 126.1, C | |||
2’ | 113.9, CH | 6.82 (1H, s) | C-2, C-1’, C-3’ | |
3’ | 145.8, C | |||
4’ | 144.3, C | |||
5’ | 110.5, CH | 6.68 (1H, s) | C-10, C-4’, C-6’ | |
