Polysubstituted pyridyl pyrazolecarboxamide and preparation method and use thereof
The present invention discloses a polysubstituted pyridyl pyrazolecarboxamide and its preparation method and use. The structure of the polysubstituted pyridyl pyrazolecarboxamide of the present invention is shown in the following General Formula I. The polysubstituted pyridyl pyrazolecarboxamide has the following advantages such as good insecticidal effect, low production cost; and it may be used in control of agriculture, forest or health pests, especially of resistant pests. For its preparation method, the yield is high, the number of steps is small, and the operation is simple.
1. A compound having the following structure:
wherein,
R 1 is methyl;
R 2 is Cl or Br;
R 3b is —CH 2 CH 2 OH or —CH 2 CH 2 N(CH 2 CH 3 ) 2 ;
R 5 is Cl or F;
R 6 is hydrogen or Cl.
2. The compound of claim 1 , wherein R 1 is methyl; R 2 is Cl or Br; R 3b is —CH 2 CH 2 N(CH 2 CH 3 ) 2 ; R 5 is Cl or F; R 6 is hydrogen or Cl.
3. The compound of claim 1 , wherein R 1 is methyl; R 2 is Cl; R 3b is —CH 2 CH 2 N(CH 2 CH 3 ) 2 ; R 5 is Cl; R 6 is hydrogen.
4. An insecticide composition comprising 1 to 99 wt % of the compound of claim 1 .
5. A method of controlling a pest in a plant comprising applying to the plant the compound of claim 1 at a concentration of about 0.01 ppm to about 0.5 ppm.
6. The method of claim 5 wherein the pest is Helicoverpa armigera or Ostrinia furnacalis.