Synthesis and Antifungal Activities of Cinnamaldehyde Derivatives against Penicillium digitatum Causing Citrus Green Mold

Table 1

¹H-NMR (400 MHz, CDCl₃) data of cinnamaldehyde (CA) derivatives.

Compounds	Name	Yield (%)	^1H-NMR (400 MHz, CDCl3), δ
a	4-Nitro CA	88.12	6.81 (dd, J = 8.0, 16.0 Hz, 1H, CHCHO), 7.53 (d, J = 16.0 Hz, 1H, PhCH), 7.72–8.52 (m, 4H, ArH), 9.68 (d, J = 8.0, 1H, CHO).
b	4-Chloro CA	87.32	6.67 (dd, J = 7.6, 16.0 Hz, 1H, CHCHO), 7.39–7.49 (m, 5H, PhCH), 9.68 (d, J = 7.6, 1H, CHO).
c	4-Bromo CA	81.25	6.68 (dd, J = 7.6, 16.0 Hz, 1H, CHCHO), 7.40–7.56 (m, 5H, PhCH), 9.69 (d, J = 7.6, 1H, CHO).
d	4-Methyl CA	82.35	2.38 (s, 3H, CH3), 6.69 (dd, J = 7.6, 16.0 Hz, 1H, CHCHO), 7.23–7.48 (m, 5H, PhCH), 9.68 (d, J = 7.6, 1H, CHO).
e	4-Methoxy CA	86.65	3.88 (s, 3H, OCH3), 6.60 (dd, J = 7.6, 16.0 Hz, 1H, CHCHO), 6.93 (d, J = 6.4, 2H, ArH), 7.42 (d, J = 7.6, 1H, PhCH), 7.52 (d, J = 8.8, 2H, ArH), 9.64 (d, J = 7.6, 1H, CHO).
f	2,4-Dimethoxy CA	81.23	3.91 (s, 6H, OCH3), 6.60 (dd, J = 7.6, 16.0 Hz, 1H, CHCHO), 6.85–7.07 (m, 3H, ArH), 7.40 (d, J = 16.0, 1H, PhCH), 9.64 (d, J = 7.6, 1H, CHO).