Table 1 NMR spectra of the peak 1 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 1 (in CD 3 OD) | ||||
2 | 82.6, CH | 5.39 (1H, d, 1.7) | H-3 | C-3, C-4, C-9, C-1’, C-2’ |
3 | 66.7, CH | 4.04 (1H, ddd, 9.0, 1.0, 1.0) | H-2, H-4a, H-4b | |
4 | 37.5, CH2 | a: 1.39 (1H, dd, 13.2, 2.5) b: 2.65 (1H, dd, 13.2, 9.3) | H-3, H-4b H-3, H-4a | C-3, C-6’ C-5, C-10 |
5 | 173.9, C | |||
6 | −, CH | — | ||
7 | −, C | |||
8 | 99.2, CH | 5.48 (1H, s) | C-9, C-10 | |
9 | 175.0, C | |||
10 | 48.0, C | |||
1’ | 127.5, C | |||
2’ | 112.2, CH | 6.89 (1H, s) | C-2, C-4’, C-6’ | |
3’ | 147.6, C | |||
4’ | 145.8, C | |||
5’ | 112.9, CH | 6.81 (1H, s) | C-10, C-1’, C-3’, C-4’ | |
6’ | 127.1, C | |||
Peak 1 (in DMSO- d 6) | ||||
2 | 80.3, CH | 5.33 (1H, d, 1.5) | H-3 | C-3, C-4, C-9, C-2’ |
3 | 65.7, CH | 3.87 (1H, d, 9.0) | H-2, H-4a, H-4b | C-2 |
4 | 35.8, CH2 | a: 1.22 (1H, d, 7.2) b: 2.42 (1H, dd, 9.6, 9.6) | H-3 H-3 | C-3, C-6’ |
5 | 163.1, C | |||
6 | −, CH | 5.44, s | ||
7 | −, C | |||
8 | −, CH | 5.24 (1H, s) | C-9 | |
9 | 170.9, C | |||
10 | 48.6, C | |||
1’ | 126.2, C | |||
2’ | 112.2, CH | 6.86 (1H, s) | C-2, C-1’, C-3’ | |
3’ | 144.3, C | |||
4’ | 145.8, C | |||
5’ | 111.1, CH | 6.67 (1H, s) | C-4’, C-6’ | |
6’ | 125.6, C | |||
