500008-45-7

Chlorantraniliprole is a pyrazolylpyridine insecticide and an activator of insect ryanodine receptor.

ChEBI: A carboxamide resulting from the formal condensation of the carboxylic acid group of 3-bromo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxylic acid with the primary amino group of 2-amino-5-chloro-N,3-dimethylbenzamide The first of the anthranilic diamide insecticides, it is a ryanodine receptor activator and is used to protect a wide variety of crops, including corn, cotton, grapes, rice and potatoes.

White crystal, specific gravity (for liquid) 1.507g/mL, melting point 208-210℃, decomposition temperature 330℃, vapor pressure (under 20~25) 6.3×1012Pa, solubility (under 20~25, mg/L): water 1.023, acetone 3.446, methanol 1.714, acetonitrile 0.711, ethyl acetate 1.144. Chlorfenvinphos It is highly efficient and broad-spectrum, and has good control effect on Lepidoptera of Noctuidae, stem borer moths, fruit moths, leaf roller moths, pink moths, vegetable moths, wheat moths, and fine moths, etc. It can also control Sphingidae weevils, leaf beetles; Diptera subterranean flies; sooty fly and many other non-lepidopteran pests.

Chlorantraniliprole was synthesized by reaction of 3-bromo-1-(3-chloropyridin-2-pyridinyl)-1H-pyrazole-5carboxylic acid with 2-amino-5-chloro-3-methylbenzoic acid.3-bromo-1-(3-chloropyridin-2-pyridinyl)-1H-pyrazole5-carboxylic acid was prepared by reaction of maleic anhydride with 2,3-dichloropyridine as starting materials in eight steps.2-Amino-5-chloro-3-methylbenzoic acid was prepared by reaction of 2-amino-3-methylbenzoic acid in one step.The structure of target compound was conf irmed by 1H NMR.Total yield was 36.3%(calculated with 2,3-dichloropyridine),and purity determined by HPLC was over 95%.

Exhibits larvicidal activity as an orally ingested toxicant by targeting and disrupting the Ca2+ balance; Ryanodine receptor modulator.

A mixture of 3-bromo-1-(3-chloro-2-pyridinyl)-1H-pyrazole-5-carboxylic acid (93.6% purity, 16.16 g, 50.0 mmol), 6-chloro-8-methyl-2,4-dihydro-1H-3,1-benzoxazine-2,4-dione (99.0% purity, 11.22 g, 52.5 mmol), and 3-methylpyridine (16.5 mL. 15.8 g, 170 mmol) were added slowly and dropwise to an acetonitrile (15 mL) solution of methanesulfonyl chloride (5.0 mL, 7.4 g, 65 mmol) in acetonitrile (65 mL) at -5 °C. The reaction mixture was stirred at -5 to 0 °C for 15 minutes before being warmed to 50 °C and maintained for 4 hours. Subsequently, the reaction system was cooled to room temperature, water (29 mL) was added slowly and dropwise, and stirring was continued for 15 minutes. Next, 40% aqueous methylamine solution (20.0 mL, 17.9 g, 231 mmol) was added all at once and stirred overnight at room temperature. After completion of the reaction, the mixture was filtered, and the solid was washed sequentially with 2:1 acetonitrile-water (2 × 30 mL) and pure acetonitrile (3 × 30 mL), and dried under nitrogen protection to afford the target product, 3-bromo-N-(4-chloro-2-methyl-6-(methylcarbamoyl)phenyl)-1-(3-chloro-pyridin-2-yl)-1H-pyrazole-5-carboxamide, as a light yellow powder, 22.44 g (HPLC purity 95.5%, yield calculated based on purity 88.7%). The structure of the product was confirmed by 1H NMR (CDCl3): δ 2.18 (s, 3H), 2.95 (s, 3H), 6.21 (m, 1H), 7.10 (s, 1H), 7.24 (m, 2H), 7.39 (m, 1H), 7.80 (d, 1H), 8.45 (d, 1H).

Store at -20°C

[1] Patent: WO2004/111030, 2004, A1. Location in patent: Page 42

Insecticide