Table 1.
The biological activity(%) of compounds 3a ~ 3w against Brassica napus and Echinochloa crusgalli (L.) Beauv
| Cpd No |
R1 ; R2 | Brassica napus(ug/mL, inhibition %) | Echinochloa crusgalli (L.) Beauv(ug/mL, inhibition %) | |||
|---|---|---|---|---|---|---|
| 10 | 100 | 10 | 100 | Bleaching result at 100 ug/mL * | ||
| 3a | 3-NO2 ; Me | 0 | 22.4 | 5.2 | 42.8 | + |
| 3b | 4-NO2 ; Me | 5.1 | 40.9 | 9.0 | 51.9 | + |
| 3c | 4-Cl ; Me | 15.8 | 90.5 | 9.4 | 50.1 | + |
| 3d | 2-CH3 ; Me | 0 | 44.4 | 31.2 | 78.3 | ++ |
| 3e | 3-CH3 ; Me | 14.0 | 64.0 | 25.3 | 68.3 | ++ |
| 3f | 4-OCH3 ; Me | 7.9 | 50.7 | 16.2 | 78.8 | ++ |
| 3g | 3-NO2 ; i-Pr | 10.2 | 70.3 | 0 | 42 | + |
| 3h | 4-NO2 ; i-Pr | 4.5 | 34.2 | 0 | 1.6 | - |
| 3i | 2-Cl ; i-Pr | 38.9 | 66.8 | 51 | 77.9 | ++ |
| 3j | 4-Cl ; i-Pr | 16 | 77.2 | 25.1 | 68 | ++ |
| 3k | 2-OCH3 ; i-Pr | 3.0 | 58.7 | 77.3 | 78.1 | +++ |
| 3l | 4-OCH3 ; i-Pr | 11.9 | 71 | 79.6 | 80 | +++ |
| 3m | 2-CH3 ; i-Pr | 15.2 | 62.4 | 76.9 | 77.3 | +++ |
| 3n | 3-CH3 ; i-Pr | 3.3 | 82.1 | 49.2 | 75.5 | +++ |
| 3o | 4-CH3 ; i-Pr | 8.1 | 86.4 | 76.8 | 78.4 | +++ |
| 3p | 3-NO2; t-Bu | 22.1 | 80.1 | 0 | 0.5 | - |
| 3q | 4-NO2; t-Bu | 1.8 | 48.1 | 0 | 9.8 | - |
| 3r | 4-Cl; t-Bu | 13.8 | 98 | 0.4 | 20.8 | - |
| 3s | 2-OCH3; t-Bu | 41.2 | 69.5 | 74.9 | 82.9 | ++ |
| 3t | 4-OCH3; t-Bu | 5.4 | 77.7 | 78.7 | 80.3 | ++ |
| 3u | 2-CH3; t-Bu | 21.1 | 74.9 | 63.6 | 74.4 | ++ |
| 3v | 3-CH3; t-Bu | 24.9 | 85.0 | 4.9 | 48.5 | + |
| 3w | 4-CH3; t-Bu | 13.5 | 88.1 | 36.3 | 48 | + |
| Sulcotrione** | 3.5 | 38.1 | 29.4 | 45.1 | +++ | |
* - no change ; + weak ; + + moderate ; + + + high; ** 2-(2-chloro-4-mesylbenzoyl)cyclohexane-1,3-dione