87035-49-2

Upstream product

• 60075-04-9 (RS)-methyl 2-(4-hydroxyphenoxy)propionate 
• 89402-43-7 5-chloro-2,3-difluoropyridine 
• 67-56-1 methanol 
• 94050-90-5 (RS)-2-(4-hydroxyphenoxy)propionic acid 
• 185985-40-4 2,3-dichloro -5-fluoropyridine 
• 75272-53-6 2,4,4-trichloro-4-formylbutyronitrile 
• 823-56-3 2-Fluoro-3,5-dichloropyridine 
• 16063-70-0 2,3,5-trichloropyridine 

Relevant academic research and scientific papers

Preparation method 2-substituted halogenated pyridine compound (by machine translation)

The method 2 - of,substituted halopyridines compound 2,3 - takes,substituted halogenated pyridine compounds as raw materials, in the presence of inorganic bases, and nucleophilic reagents to prepare 2 -substituted halogenated pyridine compounds . The product purity 6 - can be obviously inhibited from being subjected to the etherification reaction in a mixed solvent of a polar aprotic solvent and a lower alcohol . to yield more than, products, in a post-treatment manner through filtering,bit substituted halogeno-pyridine compounds . The method comprises the step, 88%, of concentrating 96% -position 15%. substituted halogenated pyridine compounds. (by machine translation)

Direct formation of 2,3,5-trichloropyridine and its nucleophilic displacement reactions in ionic liquid

Reaction of trichloroacetaldehyde and acrylonitrile in the presence of a catalytic amount of copper (I) chloride in ionic liquid afforded 2,3,5-trichloropyridine, fluprination of which with KF and CsF in ionic liquid afforded 3,5-dichloro-2-fluoropyridihe and 5-chloro-2,3-dichloropyridine. Reaction of 2,3,5-trichloropyridine, 3,5-dichloro-2-fluoropyridine, or 5-chloro-2,3-dichloropyride with 2-(4-hydroxyphenoxy) propionates in ionic liquid afforded the corresponding 2-aryloxylpropionates in good yields.

Sulfamoylphenylureas

The N-acylsulfamoylphenylureas of formula I below are suitable as counter-agents (antidotes or safeners) for protecting cultivated plants from the phytotoxic action of herbicides. Suitable crops are preferably cereals, soybeans, sorghum, maize and rice, and suitable herbicides are sulfonylureas, chloroacetanilides and aryloxyphenoxypropionic acid derivatives. The N-acylsulfamoylphenylureas have the formula I STR1 wherein A is a radical selected from the group STR2 R1 is C1 -C4 -alkoxy or each of R1 and R2, independently of the other, is hydrogen, C1 -C8 alkyl, C3 -C8 cycloalkyl, C3 -C6 alkenyl, C3 -C6 alkynyl, STR3 or C1 -C4 alkyl substituted by C1 -C4 alkoxy or by STR4 or R1 and R2 together form a C4 -C6 alkylene bridge, or a C4 -C6 alkylene bridge interrupted by oxygen, sulfur, SO, SO2, NH or by --N(C1 -C4 alkyl)-, R3 is hydrogen or C1 -C4 alkyl, Ra to Rh, Rx and Ry are as defined in the disclosure.

Pyridyl(oxy/thio)phenoxy compounds herbicidal compositions and methods

Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF3, CF2 Cl or CF2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.

Process for the preparation of fluorinated pyridine derivatives

In accordance with a novel process, 2,3-difluoropyridines of formula I STR1 wherein X is halogen or trifluoromethyl, are prepared by diazotising a 3-amino-2-halopyridine of formula II STR2 wherein X is as defined for formula I and Y is bromine, chlorine or fluorine, in the presence of hydrogen fluroide, to give a 3-fluoro-2-halopyridine of formula III STR3 wherein X and Y are as defined for formula II, and treating resultant 3-fluoro-2-halopyridines of formula III, wherein Y is bromine or chlorine, with a fluorinating agent. The 2,3-difluoropyridines prepared by the novel process are valuable intermediates for the preparation of 2-[4-(3-fluoropyridin-2-yloxy)-phenoxy]propionic acid derivatives which are known as herbicides.

Certain pyridyloxy or thio-phenoxy-propanoic acids or salts thereof useful as herbicides

Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF3, CF2 Cl or CF2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.

2-phenoxypropionic acid cyanamides as herbicides

2-Phenoxypropionic acid cyanamides of the formula STR1 have a useful selective herbicidal activity against weeds, preferably grass weeds, in crops of useful plants. In this formula R is hydrogen, C1 -C4 alkyl, C3 -C4

Pyridyl(oxy/thio)phenoxy compounds, herbicidal compositions and methods

Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF3, CF2 Cl or CF2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.