4-Hydroxy-3-methoxycinnamaldehyde (Coniferaldehyde)

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.