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2,4-Dichlorophenoxybutyric acid, commonly known as 2,4-D, is a chlorinated phenoxy herbicide that exists as colorless crystals. It is slightly corrosive to iron and soluble in organic solvents. This selective post-emergence herbicide is characterized by its white to light-brown crystalline solid form and a slight phenolic odor.

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  • 94-82-6 Structure
  • Basic information

    1. Product Name: 2,4-Dichlorophenoxybutyric acid
    2. Synonyms: 2,4-D Butyric;2,4-D butyric acid;2,4-dbutyricacid;2,4-DM;4-(2,4-dichlorophenoxy)-butyricaci;buratal;butanoicacid,4-(2,4-dichlorophenoxy)-;Butirex
    3. CAS NO:94-82-6
    4. Molecular Formula: C10H10Cl2O3
    5. Molecular Weight: 249.09
    6. EINECS: 202-366-9
    7. Product Categories: Pharmaceutical Raw Materials;Organic acids
    8. Mol File: 94-82-6.mol
  • Chemical Properties

    1. Melting Point: 118-120 °C(lit.)
    2. Boiling Point: 410.363 °C at 760 mmHg
    3. Flash Point: 201.98 °C
    4. Appearance: Off-white/Amorphous Powder
    5. Density: 1.3342 (estimate)
    6. Vapor Pressure: 8.07E-06mmHg at 25°C
    7. Refractive Index: 1.552
    8. Storage Temp.: 0-6°C
    9. Solubility: N/A
    10. PKA: 4.56±0.10(Predicted)
    11. Water Solubility: 53mg/L(room temperature)
    12. Merck: 13,2855
    13. BRN: 1976809
    14. CAS DataBase Reference: 2,4-Dichlorophenoxybutyric acid(CAS DataBase Reference)
    15. NIST Chemistry Reference: 2,4-Dichlorophenoxybutyric acid(94-82-6)
    16. EPA Substance Registry System: 2,4-Dichlorophenoxybutyric acid(94-82-6)
  • Safety Data

    1. Hazard Codes: Xn,N
    2. Statements: 22-51/53
    3. Safety Statements: 25-29-46-61
    4. RIDADR: UN 3077 9/PG 3
    5. WGK Germany: 2
    6. RTECS: ES9100000
    7. HazardClass: 6.1(b)
    8. PackingGroup: III
    9. Hazardous Substances Data: 94-82-6(Hazardous Substances Data)

94-82-6 Usage

Uses

Used in Agriculture:
2,4-Dichlorophenoxybutyric acid is used as a herbicide for controlling a wide range of broadleaf weeds and grasses in various crops. It is effective in both preand post-emergence applications, making it a versatile tool for farmers to manage unwanted plant growth.
Used in Industrial Applications:
In some cases, 2,4-Dichlorophenoxybutyric acid may also be utilized in industrial settings for specialized purposes, such as in the production of certain chemicals or as an intermediate in the synthesis of other compounds. However, its primary application remains in the agricultural sector for weed control.

Reactivity Profile

2,4-Dichlorophenoxybutyric acid is an organic acid. Neutralizes bases in exothermic reactions. Forms water soluble metal and amine salts. Hard water precipitates the calcium and magnesium salts from aqueous solutions of such salts.

Potential Exposure

2,4-DB is a chlorophenoxy/arylox- yalkanoic acid selective systemic herbicide used to control annual and perennial broadleaf weeds in many field crops such as alfalfa, peanuts, cereals and soybeans; used as a defoliant. In the plant, the compound changes to 2,4-D and inhibits growth at the tips of stems and roots.

Incompatibilities

2,4-DB is a weak organic acid. Keep away from oxidizers, sulfuric acid, caustics, ammonia, aliphatic amines, alkanolamines, isocyanates, alkylene oxides, and epichlorohydrin. Corrosive to iron, aluminum, zinc, and possibly other metals, especially in the presence of moisture.

Waste Disposal

Do not discharge into drains or sewers. Dispose of waste material as hazardous waste using a licensed disposal contractor to an approved landfill. Consult with environmental regulatory agencies for guid- ance on acceptable disposal practices. Incineration with effluent gas scrubbing is recommended. Containers must be disposed of properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office

Check Digit Verification of cas no

The CAS Registry Mumber 94-82-6 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 4 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 94-82:
(4*9)+(3*4)+(2*8)+(1*2)=66
66 % 10 = 6
So 94-82-6 is a valid CAS Registry Number.
InChI:InChI=1/C10H10Cl2O3/c1-2-8(10(13)14)15-9-4-3-6(11)5-7(9)12/h3-5,8H,2H2,1H3,(H,13,14)

94-82-6SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name 2,4-DB

1.2 Other means of identification

Product number -
Other names 2,4-D butyric acid

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Herbicide
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:94-82-6 SDS

94-82-6Synthetic route

4-butanolide
96-48-0

4-butanolide

sodium 2,4-dichlorophenolate
3757-76-4

sodium 2,4-dichlorophenolate

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
at 200℃;
With butan-1-ol at 160℃;
4-(2,4-dichlorophenoxy)butanenitrile
63867-25-4

4-(2,4-dichlorophenoxy)butanenitrile

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
With sulfuric acid; acetic acid
With potassium hydroxide
1-(3-bromopropoxy)-2,4-dichlorobenzene
6954-78-5

1-(3-bromopropoxy)-2,4-dichlorobenzene

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
2: aqueous H2SO4; acetic acid
View Scheme
(3-chloro-propyl)-(2,4-dichloro-phenyl)-ether
78483-28-0

(3-chloro-propyl)-(2,4-dichloro-phenyl)-ether

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: ethanol
2: aq.-ethanolic KOH
View Scheme
sodium 2,4-dichlorophenolate
3757-76-4

sodium 2,4-dichlorophenolate

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: ethanol
2: ethanol
3: aq.-ethanolic KOH
View Scheme
2,4-dichlorophenol
120-83-2

2,4-dichlorophenol

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: potassium carbonate; potassium iodide / acetone / 0.5 h / 20 °C
1.2: 15 h / Reflux
2.1: sodium hydroxide / ethanol; water / 3 h / Reflux
2.2: 20 °C / pH 1
View Scheme
Multi-step reaction with 2 steps
1: potassium carbonate / dimethyl sulfoxide
2: sodium hydroxide
View Scheme
ethyl 4-(2,4-dichlorophenoxy)butanoate
42609-41-6

ethyl 4-(2,4-dichlorophenoxy)butanoate

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
Stage #1: ethyl 4-(2,4-dichlorophenoxy)butanoate With sodium hydroxide In ethanol; water for 3h; Reflux;
Stage #2: With hydrogenchloride In ethanol; water at 20℃; pH=1;
With sodium hydroxide
4-phenoxybutan-1-ol
1927-71-5

4-phenoxybutan-1-ol

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: zinc(II) chloride; 3,4-dichlorothiophene; chlorine / 0.5 h / 0 °C
2: platinum on activated charcoal / water / 80 - 85 °C / 8250.83 Torr
View Scheme
2,4-dichlorophenoxybutanol

2,4-dichlorophenoxybutanol

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
With platinum on activated charcoal In water at 80 - 85℃; under 8250.83 Torr; Reagent/catalyst; Pressure; Temperature;249.85 g
4-bromoethylbutanoate
2969-81-5

4-bromoethylbutanoate

2,4-dichlorophenol
120-83-2

2,4-dichlorophenol

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Conditions
ConditionsYield
Stage #1: Ethyl 4-bromobutyrate; 2,4-dichlorophenol With potassium carbonate Williamson Ether Synthesis; Reflux;
Stage #2: With water In tetrahydrofuran; methanol Alkaline conditions;
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

(2R,3R,4S,5S)-4-Amino-5-hydroxymethyl-2-{6-[(naphthalen-1-ylmethyl)-amino]-purin-9-yl}-tetrahydro-furan-3-ol
676558-83-1

(2R,3R,4S,5S)-4-Amino-5-hydroxymethyl-2-{6-[(naphthalen-1-ylmethyl)-amino]-purin-9-yl}-tetrahydro-furan-3-ol

3'-[4-(2,4-dichlorophenyloxy)butanamido]-3'-deoxy-N6-(1-naphthylmethyl)adenosine

3'-[4-(2,4-dichlorophenyloxy)butanamido]-3'-deoxy-N6-(1-naphthylmethyl)adenosine

Conditions
ConditionsYield
Multistep reaction;95%
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

4-amino-1-(3,3-diphenylpropyl)piperidine
163268-13-1

4-amino-1-(3,3-diphenylpropyl)piperidine

4-(2,4-Dichloro-phenoxy)-N-[1-(3,3-diphenyl-propyl)-piperidin-4-yl]-butyramide

4-(2,4-Dichloro-phenoxy)-N-[1-(3,3-diphenyl-propyl)-piperidin-4-yl]-butyramide

Conditions
ConditionsYield
With benzotriazol-1-ol; diisopropyl-carbodiimide In dichloromethane; N,N-dimethyl-formamide for 19h;81%
1,3-dimethylbarbituric acid
769-42-6

1,3-dimethylbarbituric acid

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

C16H16Cl2N2O5

C16H16Cl2N2O5

Conditions
ConditionsYield
With dmap; dicyclohexyl-carbodiimide In dichloromethane at 20℃;70%
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

3-aminoadamantan-1-ol
702-82-9

3-aminoadamantan-1-ol

4-(2,4-dichloro-phenoxy)-N-((1R,3S,5R,7S)-3-hydroxy-adamantan-1-yl)-butyramide

4-(2,4-dichloro-phenoxy)-N-((1R,3S,5R,7S)-3-hydroxy-adamantan-1-yl)-butyramide

Conditions
ConditionsYield
Stage #1: 4-(2,4-dichlorophenoxy)butyric acid With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In tetrahydrofuran at 20℃; for 0.166667h;
Stage #2: 3-aminoadamantan-1-ol With N-ethyl-N,N-diisopropylamine In tetrahydrofuran at 20℃; for 16h;
62%
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

camptothecin
7689-03-4

camptothecin

4-(2,4-dichloro-phenoxy)-butyric acid 4-ethyl-3,13-dioxo-3,4,12,13-tetrahydro-1H-2-oxa-6,12a-diaza-dibenzo[b,h]fluoren-4-yl ester

4-(2,4-dichloro-phenoxy)-butyric acid 4-ethyl-3,13-dioxo-3,4,12,13-tetrahydro-1H-2-oxa-6,12a-diaza-dibenzo[b,h]fluoren-4-yl ester

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 20℃;47.3%
trans-(+-)-N,N'-dimethylcyclohexane-1,2-amine

trans-(+-)-N,N'-dimethylcyclohexane-1,2-amine

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

1,1'-carbonyldiimidazole
530-62-1

1,1'-carbonyldiimidazole

trans-(+/-)-4-(2,4-dichlorophenoxy)-N-methyl-N-[2-(methylamino)cyclohexyl]butanamide monohydrochloride

trans-(+/-)-4-(2,4-dichlorophenoxy)-N-methyl-N-[2-(methylamino)cyclohexyl]butanamide monohydrochloride

Conditions
ConditionsYield
With hydrogenchloride In tetrahydrofuran; diethyl ether17%
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

4-(2,4-dichloro-phenoxy)-butyryl chloride
31770-28-2

4-(2,4-dichloro-phenoxy)-butyryl chloride

Conditions
ConditionsYield
With thionyl chloride
With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 20℃; for 0.25h;
With thionyl chloride In N,N-dimethyl-formamide Reflux;
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

4-(2,4-dichloro-phenoxy)-butyric acid amide
51992-35-9

4-(2,4-dichloro-phenoxy)-butyric acid amide

Conditions
ConditionsYield
With thionyl chloride; benzene Eintragen des Reaktionsgemisches in wss. NH3;
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

N-chloromethyl-carbamic acid 2-chlorophenyl ester
64381-36-8

N-chloromethyl-carbamic acid 2-chlorophenyl ester

4-(2,4-Dichloro-phenoxy)-butyric acid (2-chloro-phenoxycarbonylamino)-methyl ester
64381-15-3

4-(2,4-Dichloro-phenoxy)-butyric acid (2-chloro-phenoxycarbonylamino)-methyl ester

Conditions
ConditionsYield
With triethylamine
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Chloromethyl-carbamic acid 2,4-dichloro-phenyl ester
64381-41-5

Chloromethyl-carbamic acid 2,4-dichloro-phenyl ester

4-(2,4-Dichloro-phenoxy)-butyric acid (2,4-dichloro-phenoxycarbonylamino)-methyl ester
64381-20-0

4-(2,4-Dichloro-phenoxy)-butyric acid (2,4-dichloro-phenoxycarbonylamino)-methyl ester

Conditions
ConditionsYield
With triethylamine
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Chloromethyl-carbamic acid 2,6-dichloro-phenyl ester
64381-42-6

Chloromethyl-carbamic acid 2,6-dichloro-phenyl ester

4-(2,4-Dichloro-phenoxy)-butyric acid (2,6-dichloro-phenoxycarbonylamino)-methyl ester
64381-29-9

4-(2,4-Dichloro-phenoxy)-butyric acid (2,6-dichloro-phenoxycarbonylamino)-methyl ester

Conditions
ConditionsYield
With triethylamine
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

Chloromethyl-carbamic acid 3,5-dimethyl-4-methylsulfanyl-phenyl ester
64381-44-8

Chloromethyl-carbamic acid 3,5-dimethyl-4-methylsulfanyl-phenyl ester

4-(2,4-Dichloro-phenoxy)-butyric acid (3,5-dimethyl-4-methylsulfanyl-phenoxycarbonylamino)-methyl ester
64381-34-6

4-(2,4-Dichloro-phenoxy)-butyric acid (3,5-dimethyl-4-methylsulfanyl-phenoxycarbonylamino)-methyl ester

Conditions
ConditionsYield
With triethylamine
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

4-(2,4-Dichloro-phenoxy)-N-methyl-N-((1S,2R)-2-pyrrolidin-1-yl-cyclohexyl)-butyramide
99239-57-3, 99239-71-1, 130553-68-3

4-(2,4-Dichloro-phenoxy)-N-methyl-N-((1S,2R)-2-pyrrolidin-1-yl-cyclohexyl)-butyramide

Conditions
ConditionsYield
With pyridine; dicyclohexyl-carbodiimide In dichloromethane Ambient temperature;
1-hydroxy-pyrrolidine-2,5-dione
6066-82-6

1-hydroxy-pyrrolidine-2,5-dione

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

4-(2,4-Dichloro-phenoxy)-butyric acid 2,5-dioxo-pyrrolidin-1-yl ester

4-(2,4-Dichloro-phenoxy)-butyric acid 2,5-dioxo-pyrrolidin-1-yl ester

Conditions
ConditionsYield
With N-(3-dimethylaminopropyl)-N-ethylcarbodiimide In N,N-dimethyl-formamide
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

2-<(1S,2S(?))-6,6-dimethyl-norpinan-2-yl>-ethanol

2-<(1S,2S(?))-6,6-dimethyl-norpinan-2-yl>-ethanol

4-(2,4-dichloro-phenoxy)-butyric acid-{2-[(1S,2S)-6,6-dimethyl-norpinan-2-yl]-ethyl ester}
5423-01-8

4-(2,4-dichloro-phenoxy)-butyric acid-{2-[(1S,2S)-6,6-dimethyl-norpinan-2-yl]-ethyl ester}

Conditions
ConditionsYield
With sulfuric acid; xylene Entfernen des entstehenden Wassers;
(E)-(RS)-3-[1-(allyloxyimino)butyl]4-hydroxy-6,6-dimethyl-2-oxocyclohex-3-enecarboxylic acid

(E)-(RS)-3-[1-(allyloxyimino)butyl]4-hydroxy-6,6-dimethyl-2-oxocyclohex-3-enecarboxylic acid

decaethylene glycol
5579-66-8

decaethylene glycol

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

C46H71Cl2NO17

C46H71Cl2NO17

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

4-(2,4-Dichlorophenoxy)butyric acid ethoxycarbonyl-ethylsulfanylcarbonyloxy-methyl ester

4-(2,4-Dichlorophenoxy)butyric acid ethoxycarbonyl-ethylsulfanylcarbonyloxy-methyl ester

oxalyl dichloride
79-37-8

oxalyl dichloride

5-(3,3-dichloro-allyloxy)-N-hydroxy-2-methoxy-benzamidine
796119-00-1

5-(3,3-dichloro-allyloxy)-N-hydroxy-2-methoxy-benzamidine

4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

3-[5-(3,3-dichloro-allyloxy)-2-methoxy-phenyl]-5-[3-(2,4-dichloro-phenoxy)-propyl]-[1,2,4]oxadiazole

3-[5-(3,3-dichloro-allyloxy)-2-methoxy-phenyl]-5-[3-(2,4-dichloro-phenoxy)-propyl]-[1,2,4]oxadiazole

Conditions
ConditionsYield
In pyridine; dichloromethane; water; N,N-dimethyl-formamide
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

cobalt(II) nitrate

cobalt(II) nitrate

cobalt(II) γ-(2,4-dichlorophenoxy)butyrate hydrate

cobalt(II) γ-(2,4-dichlorophenoxy)butyrate hydrate

Conditions
ConditionsYield
With NaOH In water addn. of an aq. NaOH soln. to the ligand, stirring until getting a neutral or weakly acidic reaction, filtration, addn. of the filtrate to a soln. of Co(NO3)2 in water, keeping the resultant pptn. under the mother liquor for 24 h; filtration under suction, washing with water, drying in air, elem. anal.;
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

cobalt(II) γ-(2,4-dichlorophenoxy)butyrate

cobalt(II) γ-(2,4-dichlorophenoxy)butyrate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: NaOH / water
2: neat (no solvent)
View Scheme
4-(2,4-dichlorophenoxy)butyric acid
94-82-6

4-(2,4-dichlorophenoxy)butyric acid

C8H9N2O3PolS

C8H9N2O3PolS

C18H17Cl2N2O5PolS

C18H17Cl2N2O5PolS

Conditions
ConditionsYield
Stage #1: C8H9N2O3PolS With dmap; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; for 5h; polystyrene resin;
Stage #2: 4-(2,4-dichlorophenoxy)butyric acid With diisopropyl-carbodiimide In dichloromethane at 20℃; polystyrene resin;

94-82-6Relevant articles and documents

Identification of small molecules blocking the pseudomonas aeruginosa type iii secretion system protein pcrv

Sundin, Charlotta,Saleeb, Michael,Spjut, Sara,Qin, Liena,Elofsson, Mikael

, p. 1 - 17 (2021/01/13)

Pseudomonas aeruginosa is an opportunistic bacterial pathogen that employs its type III secretion system (T3SS) during the acute phase of infection to translocate cytotoxins into the host cell cytoplasm to evade the immune system. The PcrV protein is located at the tip of the T3SS, facilitates the integration of pore-forming proteins into the eukaryotic cell membrane, and is required for translocation of cytotoxins into the host cell. In this study, we used surface plasmon resonance screening to identify small molecule binders of PcrV. A follow-up structure-activity relationship analysis resulted in PcrV binders that protect macrophages in a P. aeruginosa cell-based infection assay. Treatment of P. aeruginosa infections is challenging due to acquired, intrinsic, and adaptive resistance in addition to a broad arsenal of virulence systems such as the T3SS. Virulence blocking molecules targeting PcrV constitute valuable starting points for development of next generation antibacterials to treat infections caused by P. aeruginosa.

A method for preparing chloro-benzene oxygen carboxylic acid (by machine translation)

-

Paragraph 0062; 0064; 0068; 0070, (2019/01/08)

The invention provides a method for preparing carboxylic acid chloro-benzene oxygen, comprising the following steps: S1) phenoxy fatty alcohol in the catalyst B A and under the action of the catalyst, and the chlorinating agent to 2 bit and/or 4 bit selective chlorination reaction, to obtain chloro-benzene oxygen fatty alcohol; said catalyst A is Lewis acid; said catalyst B is C5 - 22 of the thioether, thiazole, isothiazole, thiophene or their halogenated derivatives; S2) [...] fatty alcohol and water, under the action of a catalyst, and an oxidizing agent for the selective catalytic oxidation reaction, get chloro-benzene oxygen carboxylic acid. The invention through the re-design of the process route, the catalyst and the chlorinating agent fine screening, effectively reduces the energy consumption, the selectivity of the dichloride to improve at the same time avoiding the losses of the active ingredient, the resulting chloro-benzene oxygen carboxylic acid content can be up to 98.5% or more, the total yield can be up to 99% or more. (by machine translation)

Synthesis and Herbicidal Activity of α-(Substituted Phenoxybutyryloxy or Valeryloxy)alkylphosphonates and 2-(Substituted Phenoxybutyryloxy)alkyl-5,5-dimethyl-1,3,2-dioxaphosphinan-2-one

Wang, Wei,Zhang, Sha-Sha,Zhou, Yuan,Peng, Hao,He, Hong-Wu,Lu, Xing-Tao

, p. 6911 - 6915 (2016/10/03)

On the basis of our work on the modification of alkylphosphonates 1, a series of α-(substituted phenoxybutyryloxy or valeryloxy)alkylphosphonates (4-5) and 2-(substituted phenoxybutyryloxy)alkyl-5,5-dimethyl-1,3,2-dioxaphosphinan-2-one (6) were designed and synthesized. The bioassay results indicated that 14 of title compounds 4 exhibited significant postemergence herbicidal activity against velvetleaf, common amaranth, and false daisy at 150 g ai/ha. Compounds 5 were inactive against all tested weeds. Compounds 6 exhibited moderate to good inhibitory effect against the tested dicotyledonous weeds. Structure-activity relationship (SAR) analyses showed that the length of the carbon chain as linking bridge had a great effect on the herbicidal activity. Broad-spectrum tests of compounds 4-1, 4-2, 4-9, 4-30, and 4-36 were carried out at 75 g ai/ha. Especially, 4-1 exhibited 100% inhibition activity against the tested dicotyledonous weeds, which was higher than that of glyphosate.

Finding new elicitors that induce resistance in rice to the white-backed planthopper Sogatella furcifera

He, Xingrui,Yu, Zhaonan,Jiang, Shaojie,Zhang, Peizhi,Shang, Zhicai,Lou, Yonggen,Wu, Jun

supporting information, p. 5601 - 5603 (2015/11/17)

Herein we report a new way to identify chemical elicitors that induce resistance in rice to herbivores. Using this method, by quantifying the induction of chemicals for GUS activity in a specific screening system that we established previously, 5 candidate elicitors were selected from the 29 designed and synthesized phenoxyalkanoic acid derivatives. Bioassays confirmed that these candidate elicitors could induce plant defense and then repel feeding of white-backed planthopper Sogatella furcifera.

Combination of herbicides and safeners

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, (2008/06/13)

A herbicidally active composition comprises a mixture of A. a herbicidally effective amount of one or more compounds of the formula (I), ?and B. an antidote-effective amount of one or more compounds of the formulae (II) to (IV),

Herbicidal mixtures having a synergistic effect

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, (2008/06/13)

PCT No. PCT/EP96/03996 Sec. 371 Date Feb. 17, 1998 Sec. 102(e) Date Feb. 17, 1998 PCT Filed Sep. 12, 1996 PCT Pub. No. WO97/10714 PCT Pub. Date Mar. 27, 1997A composition comprising at least one sulfonylurea of the formula I wherein R1 is substituted alkyl; halogen; a group ER6 (E=O, S or NR7); COOR8; NO2; S(O)oR9; SO2NR10R11; or CONR10R11; R2 is hydrogen, alkyl, alkenyl, alkynyl, halogen, alkoxy, haloalkoxy, haloalkyl, alkylsulfonyl, nitro, cyano or alkylthio; R3 is F, CF3, CF2Cl, CF2H, OCF3, OCF2Cl, or, if R1 is CO2CH3 and R2 is simultaneously fluorine, R3 is Cl, or, if R1 is CH2CF3 or CF2CF3, R3 is methyl, or, if R4 is OCF3 or OCF2Cl, R3 is OCF2H or OCF2Br; R4 is alkoxy, alkyl, alkylthio, alkylamino, dialkylamino, halogen, haloalkyl or haloalkoxy; and R5 is hydrogen, alkoxy or alkyl; or an enviromentally compatible salt of I, and an aryloxyalkanoic acid selected from the group consisting of 2,4-D, 2,4-DB, clomeprop, dichlorprop, dichlorprop-P, dichlorprop-P (2,4-DP-P), fenoprop (2,4,5-TP), fluoroxypyr, MCPA, MCPB, mecoprop, mecoprop-P, napropamide, napropanilide, triclopyr, and an enviromentally compatible salt thereof exhibits a synergistic herbicidal effect.

Substituted pyridinesulfonamide compound or its salt, process for preparing the same, and herbicide containing the same

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, (2008/06/13)

A substituted pyridinesulfonamide compound or its salt represented by the following general formula (I): STR1 wherein A is CH or N; when A is CH, R1 and R2 may be either each independently a member selected from the group consisting of unsubstituted or substituted alkyl groups, unsubstituted or substituted alkenyl groups, unsubstituted or substituted cycloalkyl groups, and unsubstituted or substituted phenyl groups; when A is N, R1 is an unsubstituted or substituted alkyl group, R2 is an unsubstituted or substituted alkyl group, or an unsubstituted or substituted alkoxy group; and X and Y are each independently a member selected from the group consisting of alkyl groups and alkoxy groups, is disclosed. This compound is useful as the effective ingredient of a herbicide showing a wide weed-control spectrum even if used in a small amount.

Substituted pyridinesulfonamide compounds or their salts, process for preparing the same, and herbicides containing the same

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, (2008/06/13)

A substituted pyridinesulfonamide compound or its salt represented by the following general formula (I): wherein R1 is an unsubstituted or substituted alkyl group; R2 is an unsubstituted or substituted alkyl group, or an unsubstituted or substituted alkoxy group; and X and Y are each independently a member selected from the group consisting of alkyl groups and alkoxy groups, is disclosed. This compound is useful as the effective ingredient of a herbicide showing a wide weed-control spectrum even if used in a small amount.

5,6-Dihydro-1,2,4,6-thiatriazin-5-one-1,1-dioxides

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, (2008/06/13)

5,6-Dihydro-1,2,4,6-thiatriazin-5-one-1,1-dioxides of the formula STR1 where R1 is hydrogen, a metal atom or an unsubstituted or substituted ammonium radical, R2 is a saturated or unsaturated straight-chain aliphatic radical of up to 10 carbon atoms, a cycloaliphatic radical or 3 to 7 carbon atoms, a branched saturated or unsaturated aliphatic radical of 3 to 10 carbon atoms, a halogen-, alkoxy- or alkylmercapto-substituted aliphatic radical of 2 to 10 carbon atoms tetrahydrofuryl substituted methyl, a cycloalkoxy-substituted aliphatic radical of 4 to 10 carbon atoms, unsubstituted or halogen-substituted benzyl or phenyl, halophenyl, or alkylphenyl of a total of up to 10 carbon atoms, R3 is hydrogen, a straight-chain aliphatic radical of up to 10 carbon atoms, a cycloaliphatic radical of 3 to 7 carbon atoms, a branched aliphatic radical of 3 to 10 carbon atoms, haloalkyl, or alkoxyalkyl of 2 to 10 carbon atoms and X is oxygen and may also be sulfur if R2 is unsubstituted or halogen-substituted benzyl, processes for their preparation, and herbicides containing the above compounds.

Pesticide-polymer systems prepared from vinyl monomers

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, (2008/06/13)

Controlled release pesticide-polymer systems are prepared by the polymerization of vinyl monomers containing pendant pesticides. The vinyl monomers are prepared by reacting an acrylic acid derivative with a pesticide or a pesticide derivative having an active hydrogen. The pesticide-polymer systems prepared from the pesticide vinyl monomers release the active pesticide material by hydrolysis or chemical depolymerization under conditions of use.

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