1702-18-7

Usage

Uses

Used in Agricultural Industry:
3,6-dichloropicolinonitrile is used as a herbicidal agent for controlling weeds in various crops. It is particularly effective in crops such as corn, soybeans, and cotton, where its application helps to protect the growth of these plants by eliminating competing weeds.
The use of 3,6-dichloropicolinonitrile in agriculture is aimed at enhancing crop yield and quality by reducing the competition for nutrients, water, and sunlight from unwanted plants. However, it is essential to handle and apply this chemical with care due to its potential harmful effects on humans and the environment. Proper safety measures and guidelines should be followed to minimize any adverse impacts while maximizing its herbicidal benefits.

Upstream product

• 53976-62-8 2,5-dichloro-1-oxido-pyridin-1-ium 
• 51991-30-1 2-fluoro-3,6-dichloropyridine 
• 6515-09-9 2,3,6-trichloropyridine 
• 33252-29-8 6-chloro-pyridine-2-carbonitrile 

Downstream Products

• 1702-17-6 Clopyralid 
• 1610791-96-2 3-chloro-6-phenyl-2-pyridinecarbonitrile 
• 1610791-85-9 3-fluoro-6-phenyl-2-pyridinecarbonitrile 

Relevant academic research and scientific papers

Preparation method of 2, 3-dichloro-6-cyanopyridine

The invention discloses a preparation method of 2, 3-dichloro-6-cyanopyridine, and the method comprises the following steps: by using a metal chloride salt as a catalyst and phosphorus halide as a cocatalyst, carrying out one-step liquid-phase chlorination reaction on raw materials 2-chloro-6-cyanopyridine and chlorine to obtain 2, 3-dichloro-6-cyanopyridine; wherein the metal chloride salt is selected from at least one of WCl6, MoCl5, FeCl3, AlCl3, CuCl2, ZnCl2, RuCl3, SnCl4 and SbCl5, and the cocatalyst is selected from at least one of phosphorus pentachloride, phosphorus trichloride, phosphorus pentabromide and phosphorus tribromide. The method is simple in reaction process, low in production cost and high in target product selectivity and yield, the yield is 90% or above by optimizingreaction conditions, and the method has a good industrial prospect.

Preparation method of 3,6-dichloro-2-pyridinecarboxylic acid

The invention discloses a preparation method of 3,6-dichloro-2-pyridinecarboxylic acid. The preparation method comprises following steps: 2,3,6-trichloropyridine is dissolved in acetic acid, a catalyst is added, an obtained mixture is heated, hydrogen peroxide is added dropwise for oxidation, after reaction, the catalyst is removed via filtering, and concentration desolvation is carried out so as to obtain a 2,3,6-trichloropyridine oxynitride; the 2,3,6-trichloropyridine oxynitride is dissolved in solvent DMF, sodium cyanide is added, an obtained mixed material is heated for cyanation, after cyanation, rotary evaporateion desolvation is carried out, and a 2-cyano-3,6-trichloropyridine oxynitride is obtained via ethyl alcohol recrystallization; the 2-cyano-3,6-trichloropyridine oxynitride is mixed with phosphorus trichloride, an obtained product is heated for deoxygenation, after deoxygenation, desolvation is carried out, a left product is added into ice-water mixture so as to obtain a solid material via precipitation, and 2-cyano-3,6-dichloropyridine is obtained via filtering; the 2-cyano-3,6-dichloropyridine is added into an ethyl alcohol-sodium hydroxide solution for hydrolysis reaction, after hydrolysis reaction, system pH value is adjusted to 2 to 3, and the finished product 3,6-dichloro-2-pyridinecarboxylic acid is obtained via desolvation crystallization. The total yield of the preparation method is high, and generation of a large amount of salt-bearing wastewater in conventional route is avoided.

N-(phenylsulfonyl)picolinamide derivatives, process for producing the same, and herbicide

A herbicide containing as the active ingredient an N-(henylsulfonyl)picolinamide derivative represented by general formula (I) wherein X reprcsents a halogeno, a C1-4 alkyl, a C1-4 haloalkyl, a C1-4 alkoxy, a C1-4 haloalkoxy, a (C1-4 alkoxy)carbonyl, a [di(C1-4 alkyl)amino]sulfonyl, an [N—(C1-4 alkyl)-N—(C1-4 alkoxy)amino]sulfonyl, a (C1-4 alkylamino)sulfonyl, a C1-4 alkylthio, a C1-4 alkylsulfinyl, a C1-4 alkylsulfonyl, or nitro; n is an integer of 0 to 5; Y represets a halogeno, a C1-4 alkyl, a C1-4 haloalkyl, a C1-4 alkoxy, C1-4 haloalkoxy, a C1-4 alkylthio, a C1-4 haloalkylthio, amino, a C1-4 alkylamino, a di(C1-4 alkyl)amino, a (C1-4 alkoxy) C1-4 alkyl, a (C1-4 alkylthio) C1-4 alkyl, or nitro; and m is an integer of 0 to 4. This active ingredient is synthesized by condensing a substituted picolinic acid with a substituted benzenesulfonamide under dehydration, or by reacting the phenyl ester of a substituted picolinic acid with a substituted benzenesulfonamide in the presence of a basic compound.

6-(Nonsubstituted or substituted) phenoxy picolinic acids, process of preparing the same, and agricultural/horticultural germicides containing the same

An agricultural or horticultural fungicide containing 6-(unsubstituted or substituted) phenoxy picolinic acid represented by the general formula (I), as an effective ingredient. wherein R is a halogen atom, a C1to C4alkyl group, a C1to C4haloalkyl group, a C1to C4alkoxy group, a C1to C4haloalkoxy group, a C1to C4alkylthio group, a C1to C4alkylamino group, a di(C1to C4alkyl)amino group or a C7to C8aralkyl(C1to C4alkyl)amino group; n2is an integer of 0 to 3; Y is a C1to C4alkyl group, a C1to C4haloalkyl group, a C1to C4alkoxy group, a C1to C4haloalkoxy group, a C1to C4alkylthio group, a C1to C4haloalkylthio group or a halogen atom; and m is an integer of 0 to 5, and when m and n2are not less than 2, Rs and Ys may be the same or different, respectively. The compound is useful as an effective ingredient of agricultural or horticultural fungicides.

6-phenoxy picolinic acid alkylidene hydrazide derivative, process for producing the same and herbicide using the same

PCT No. PCT/JP98/02842 Sec. 371 Date Feb. 23, 2000 Sec. 102(e) Date Feb. 23, 2000 PCT Filed Jun. 25, 1998 PCT Pub. No. WO99/00370 PCT Pub. Date Jan. 7, 1999A 6-phenoxy picolinic acid alkylidene hydrazide derivative, a process for producing the derivative and a herbicide containing the derivative as an effective ingredient. Such a compound is a novel compound and is useful as an effective ingredient of herbicides.

Preparation of 2-cyano-6-chloropyridine compounds

Novel methods for preparing 2-cyano-6-chloropyridines are disclosed. The compounds are useful as intermediates in preparing other intermediates or as intermediates directly used in making pesticides, especially herbicides.