4-Hydroxy-3-methoxycinnamaldehyde (Coniferaldehyde)
C10H10O3
178.00
ESIMS m/z 178 [M – H]-
λmax 350
IR
IR(cm-¹)
(KBr) 3381 (OH),
2930 (olefinic -CH=CH-),
1675 (C=O), 1662, 1459,
1360-610 (aromatic -CH=CH-)
13 C NMR
(225 MHz, acetone-d6)
δ: 127.5 (C-1),
111.6 (C-2),
151.0 (C-3),
148.9 (C-4),
116.3 (C-5),
124.9 (C-6),
154.2 (C-7),
127.1 (C-8),
193.5 (C-9),
56.5 (OCH3)
1H NMR
(900 MHz, acetone-d6)
δ: 9.64 (1H, d, J = 8.1 Hz, H-9),
7.57 (1H, d, J = 16.2 Hz, H-7),
7.38 (1H, s, H-2),
7.21 (1H, d, J = 8.1 Hz, H-6),
6.91 (1H, d, J = 8.1 Hz, H-5),
6.65 (1H, dd, J = 16.2, 8.1 Hz, H-8),
3.93 (3H, s, OCH3)
1H_13C_HMBC
1H_13C_HSQC
HH_TOCSY.
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