In order to obtain compounds with higher herbicidal activity,amidation of carboxyl
Groups of ferulic acid is carried out,triethylamine is used as an acid-binding agent,DMF is used
As a dehydrating agent, and BOP(Carteses condensation agent)is used as a catalyst for amidation
Reaction. Six ferulic acid amide derivatives are obtaimed. Using Echinochloa crusgalli,
Digitaria sanguinalis, Amaranthus retroflexus, Brassica napus as test plants. Atrazine as a
Positive control. The herbicidal activity of the 6compounds is determined by the small cup
Method and stem-leaf spray method. The drug concentration is set to 200mg/L. The results of
The small cup method show that compounds 5and 6have inhibitory activity on the roots of B.
Napus,with inhibition rates of(73.96±6.09)%and(63.02±5.45)%. The inhibitory rate of
Compound 6against E. Crusgalli is (63.46±7.68)%. In the stem-leaf spray method,compounds
1-6all have inhibitory effects on the E. Crusgalli and D. Sanguinalis. The other compounds
Have no obvious inhibitory effect on the test plants by the method of small cup and
Stem-leaf spray, or have the opposite promotion effect.