CAS Registry Number: 144506-14-9
Taxonomy: Physicochemical and Pharmacological Properties of Flavonoids – Chalcones
C21H22O4: 338.4071
Mp: amorphous [1]
UV: 250 (3.88), 308 sh (3.95), 358 (4.24); +MeONa: 254, 270 sh, 360 sh, 438 [1]
EI-MS: 338 [M]+ (4), 307 [M-OMe]+ (100), 2.51 (60),121 (50) [1]
HR-MS: [M]+ 338.1548 (calcd. 338.1519) [1]
1 H NMR (400 MHz, acetone-d6): 1.66 (3H, s, Me-4″), 1.79 (3H, s, Me-5″), 3.41 (2H, d, J = 7.0, H-1″), 3.78 (3H, s, OMe), 5.28 (1H, m, H-2″), 6.81 (2H, d, J = 8.6, H-5), 7.01 (2H, d, J = 8.6, H-3′,5′), 7.68 (1H, d, J = 8.6, H-6), 7.73 (1H, d, J = 15.7, H-α), 8.06 (1H, d, J = 15.7, H-β), 8.10 (2H,d, J = 8.6, H-2′,6′), 9.10, 9.39 (1H each, br s, disappearing on addition of D2O, 4-and 4′-OH) [1, 2]
13 C NMR (100 MHz, MeOH-d4): [1]
Table 1
C-1 |
120.9 |
C-1′ |
131.2 |
γ,γ-dimethylallyl-C-1″ |
23.8 |
2 |
160.7 |
2′ |
132.1 |
2″ |
124.1 |
3 |
123.5 |
3′ |
116.3 |
3″ |
131.9 |
4 |
161.4 |
4′ |
163.5 |
4″ |
25.9 |
5 |
112.9 |
5′ |
116.3 |
5″ |
18.0 |
6 |
127.7 |
6′ |
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References
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(2013). Licochalcone-C. In: Azimova, S.S., Vinogradova, V.I. (eds) Natural Compounds. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0535-1_1105
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