cas 77182-82-2, Glufosinate-ammonium | Articles data

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Synthesis method of glufosinate-ammonium
The invention relates to the field of pesticides, in particular to a synthesis method of glufosinate-ammonium. The synthesis method of glufosinate-ammonium comprises the following steps: reacting a mixed aqueous solution of a hydantoin derivative, volatile alkali and a catalyst under 1.0-2.5 MPa, and after the reaction is finished, carrying out post-treatment to obtain glufosinate-ammonium, wherein the catalyst is a guanidine compound. The synthesis method of glufosinate-ammonium provided by the invention jumps out of the thought of separating glufosinate-ammonium from inorganic salt in the prior art, creatively adopts the mutual cooperation of volatile alkali and the catalyst (guanidine compound), and hydrolyzes the hydantoin derivative under the specific pressure of 1.0-2.5 MPa, so that the hydantoin compound is thoroughly hydrolyzed, the yield of glufosinate-ammonium is improved, meanwhile, the reaction time is shortened, acid-base neutralization is not needed after the reaction is finished, inorganic salt is not generated, generation of the inorganic salt in the glufosinate-ammonium preparation process is fundamentally eradicated, three wastes are not generated, the yield of glufosinate-ammonium is high, and industrial popularization is easy.
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Paragraph 0038-0082

(2021/07/01)

Method for preparing phosphorus-containing a-aminonitriles
The present invention relates primarily to processes conducted in a continuously operated reactor for preparing particular phosphorus-containing α-aminonitriles of the formulae (Ia) and (Ib) defined hereinafter from corresponding phosphorus-containing cyanohydrin esters and to the use thereof for preparation of glufosinate or of glufosinate salts. The present invention further relates to a process for producing glufosinate/glufosinate salts.
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Paragraph 0148; 0158

(2021/06/22)

Preparation method of glufosinate-ammonium
The invention discloses a preparation method of glufosinate-ammonium. According to the method, methyl phosphine dichloride is used as a raw material, and reacts with acrolein under the action of acetic anhydride to obtain an unsaturated phosphine-containing heterocyclic ring represented by a formula I; a hydrolysis reaction is performed to obtain a phosphine aldehyde intermediate represented by aformula II; the phosphine aldehyde intermediate is subjected to a strecker reaction to obtain an amino nitrile intermediate; and the amino nitrile intermediate is sequentially subjected to a hydrolysis reaction and a salifying reaction to obtain glufosinate-ammonium. According to the invention, the preparation method is short in technological process, and particularly can directly obtain the phosphine aldehyde intermediate without diethyl methylphosphite, so that the production cost of glufosinate-ammonium can be greatly reduced, and the further commercial popularization of glufosinate-ammonium is facilitated; and the method has good environmental friendliness, avoids the wastewater generated by the Grignard reaction in the traditional method, and also has no great potential safety hazard.
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Paragraph 0021; 0037-0043

(2020/05/01)

Process for preparing phosphorus-containing alpha-aminonitriles
The present invention relates primarily to processes for preparing particular phosphorus-containing α-aminonitriles of the formulae (Ia) and (Ib) defined hereinafter from corresponding phosphorus-containing cyanohydrin esters and to the use thereof for preparation of glufosinate or of glufosinate salts. The present invention further relates to a process for preparing glufosinate or glufosinate salts.
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Paragraph 0096-0099

(2020/06/08)

Method for synthesizing glufosinate ammonium salt
The invention discloses a method for synthesizing a glufosinate ammonium salt. The method comprises the following steps that (1) methyldiethoxyphosphine and n-butanol are used as raw materials to produce an intermediate I by hydrolysis and transesterification; (2) the intermediate I is subjected to a free radical addition reaction with acrolein cyanohydrin acetate to form an intermediate II; (3) the intermediate II is subjected to an aminolysis reaction with ammonia gas to form a mixture of an intermediate III and an intermediate IV; (4) the intermediate III and the intermediate IV are subjected to acid hydrolysis with hydrochloric acid to form an intermediate V; and (5) the intermediate V is neutralized, purified and crystallized to obtain the glufosinate ammonium salt. The method does not need to use toxic raw materials, avoids the large-scale use of ammonia water and ammonium chloride, not only greatly reduces the safety hazard, but also reduces the quantity of by-products and the amount of waste water generated, and the environmental protection risk is greatly reduced; and the purification process is simple, the product content and the yield coefficient are obviously increased,and the method is suitable for industrial scale production.
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Paragraph 0103; 0115-0116; 0123; 0135-0137; 0149-0150

(2019/11/13)

Synthetic method for glufosinate ammonium
The invention relates to a synthetic method for glufosinate ammonium. The synthetic method comprises the following steps: single-bromine substitution, amination, amino protection, chlorination ring opening, Arbuzov reaction and acidizing hydrolysis ammoniation; the single-bromine substitution means triggering alpha-site single-bromine substitution betweengamma-butyrolactone I and bromine under theexistence of catalyst and performing reduced pressure distillation, thereby acquiring a pure intermediate II alpha-bromine-gamma-butyrolactone; phosphorus tribromide is served as the catalyst; amination means triggering amination reaction between alpha-bromine-gamma-butyrolactone II and ammonium hydroxide, and then adding hydrochloric acid and reflowing, thereby acquiring an intermediate IIIalpha-amino-gamma-butyrolactone hydrochloride. The invention has the beneficial effects: 1) low-costgamma-butyrolactone is taken as a raw material, is subjected to single-bromine substitution with bromineand then is subjected to amination reaction with ammonium hydroxide; the adopted raw materials are low-cost and easily acquired; reaction conditions are mild; operation is simple and convenient; safety is high; amplifying production is feasible; reaction yield is high; product purity is high; cost is greatly lowered; the synthetic method is suitable for industrial production.
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Paragraph 0068; 0069

(2019/02/04)

Glufosinate ammonium salt intermediate and synthesis method of glufosinate ammonium salt
The invention provides a glufosinate ammonium salt intermediate and a synthesis method of glufosinate ammonium salt. The glufosinate ammonium salt intermediate is a compound III (wherein a formula IIIis shown in the description); the synthesis method comprises the following steps: step (1): enabling a compound I (wherein a formula I is shown in the description) and oxygen gas to react and synthesize a compound II (wherein a compound II is shown in the description) in a Pd (II) catalysis system under the reaction conditions that the temperature is 20 to 60 DEG C and the pressure is 0.4 to 0.7MPa; step (2): dissolving the compound II (wherein the compound II is shown in the description) into an alkaline water solution and reacting with an oxidant at 0 to 50 DEG C; then carrying out acidification to synthesize the compound III (wherein the formula III is shown in the description), wherein R is selected from one of C1 to C5 alkyl; then dissolving the compound III (wherein the formula IIIis shown in the description) into a solvent and adding a catalyst to react with ammonia gas and hydrogen gas in sequence, so as to prepare the glufosinate ammonium salt, i.e., a compound IV (wherein aformula IV is shown in the description). Compared with a traditional glufosinate ammonium synthesis technology, the method provided by the invention has the advantages of no utilization of highly toxic cyanide and Grignard reaction, relatively moderate reaction conditions, easiness for controlling, short steps, high yield and low cost and is suitable for industrial production.
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Paragraph 0047; 0048; 0054; 0055; 0061; 0062; 0068; 0069

(2018/09/08)

A synthesis method of grass ammonium phosphine
The invention relates to a synthesizing method for pesticide glufosinate, i.e., ((D,L)-2-amino-4-(hydroxyl(methyl)phosphinyl)butyrate) and a salt of an acid or an alkali thereof. In the synthesizing method, the pesticide glufosinate is prepared by undergoing a strecker reaction, and an intermediate compound, i.e., (3-nitrile-3-hydroxy)propyl methyl phosphonic acid directly reacts with carbon dioxide and ammonia gas in an aqueous solution to synthesize the pesticide glufosinate and a salt of an acid or an alkali thereof. The method comprises the following specific steps of: adding the intermediate compound, i.e., (3-nitrile-3-hydroxy) propyl methyl phosphonic acid into a high-pressure kettle; adding carbon dioxide, ammonia gas and water, wherein ammonium bicarbonate or ammonium carbonate and the like can be used for replacing carbon dioxide carbon and ammonium, the molar ratio of the intermediate to the carbon dioxide is between 1 and 12, and the ratio of the ammonia gas to the carbon dioxide is between 0.5 and 5; adding 15-75 times of water; heating to 120-180 DEG C; reacting for about 4-20 hours; and after the reaction, cooling, taking the reaction liquid out, and concentrating to directly obtain an ammonium salt of glufosinate. The yield is over 80 percent.
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Paragraph 0008; 0009

(2017/08/25)

Grass-ammonium phosphine preparation method
The invention discloses a preparation method of glufosinate-ammonium. The method comprises the steps that methylphosphonate compound (II) and benzylidene glycine ester compound (III) are reacted, so as to obtain benzylidene phosphonic butyric ester compound (IV); the benzylidene phosphonic butyric ester compound (IV) is further hydrolyzed, so as to obtain hydrochloride (V); finally, the target product glufosinate-ammonium (I) is obtained. The method has the advantages that the utilization of extremely toxic substance cyanide is avoided, the reaction condition is mild, monitoring is easy, and repeated recrystallization is not required for removing inorganic salt. (img file='DDA0000501075940000011.TIF' wi='1408' he=' 672' /).
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Paragraph 0019; 0028; 0025; 0029; 0040; 0041

(2017/04/28)

Grass-ammonium phosphine separation and purification method
The invention belongs to the field of pesticide production and particularly relates to a glufosinate separation and purification method. According to the method, the separation and purification is started when a glufosinate hydrochloride reaction solution in the steps of distilling the glufosinate hydrochloride reaction solution under reduced pressure to remove dilute hydrochloric acid, adding ammonia water to adjust the pH to maximally produce ammonium chloride, distilling under reduced pressure to remove water, adding a flotation solvent for dispersion, placing the material into a chute at specific temperature and speed, performing flotation separation according to the difference in the proportion of a principal component and subsidiary salt, removing the solvent, dissolving the material in aqueous methanol to remove trace ammonium chloride, filling ammonia gas to adjust the pH value to 8, performing centrifugation and drying to obtain a final product. The glufosinate separation and purification method uses a flotation method for separating the principal component glufosinate and an intermediate of the principal component from the subsidiary salt ammonium chloride and the aqueous methanol for purification and is high in yield, good in purity, simple in process, low in cost and is suitable for industrial production.
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Paragraph 0050-0070

(2017/04/22)

Synthesizing method for glufosinate-ammonium ammonium salt
The invention relates to a synthesizing method for glufosinate-ammonium ammonium salt. The synthesizing method comprises the following steps: 1) synthesizing methyl methoxyphosphoryl propionate by the reaction of methyl phosphite dimethyl phosphate with methyl acrylate and methyl alcohol; 2) synthesizing 2-[(methyl methoxy)phosphoryl]methyl-3-oxo-butyrate dimethyl ester by the Claisen condensation of methyl methoxyphosphoryl propionate and dimethyl oxalate; 3) under the acidic condition, carrying out the hydrolysis reaction to the 2-[(methyl methoxy)phosphoryl]methyl-3-oxo-butyrate dimethyl ester so as to generate 4-hydroxymethylphosphonic oxide butyric acid; and 4) under the catalyst function, successively reacting with ammonia gas and hydrogen by the 4-hydroxymethylphosphonic oxide butyric acid, and preparing the glufosinate-ammonium ammonium salt. The synthesizing method is capable of avoiding using cyanide poisonous materials. The format reaction is not used, the amount of the solvent used in the production process is small, the reaction condition is moderate and easily controlled, the synthesizing method is suitable for industrial production, the production is safe and convenient to operate, the reaction process is short, and the yield is high.
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Paragraph 0035; 0040; 0046; 0052

(2017/08/28)

Glufosinate ammonium preparation method
The invention relates to a glufosinate ammonium preparation method which includes the steps: (1) taking a compound 3 as a raw material, and performing reaction for the compound 3 and a compound 5 at the temperature ranging from 10 DEG C to 80 DEG C under the actions of alkali; (2) reacting a compound 6 at the temperature ranging from 50 DEG C to 120 DEG C under the actions of acid to obtain a compound 7. The structural formula of the compound 3 is as shown in the specification, the structural formula of the compound 5 is as shown in the specification, the structural formula of the compound 6 is as shown in the specification, the structural formula of the compound 7 is as shown in the specification, wherein R1 is alkyl, the carbon number of the alkyl is 1-5, R2 is alkyl, and the carbon number of the alkyl is 1-3. The preparation method is simple in step, low in cost and suitable for industrial production, cannot generate high-salinity wastewater and more meets environment-friendly requirements, and both the yield and the content of final products are high.
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Paragraph 0047; 0048

(2017/08/28)

Method for synthesis of glufosinate
The invention relates to a method for synthesis of glufosinate. The method comprises that (1) a compound 4 as a raw material and a compound 5 undergo a reaction at a temperature of 10 to 80 DEG C under the action of a base to obtain a compound 6, and (2) the compound 6 undergoes a reaction under the action of an acid at a temperature of 50 to 120 DEG C to produce a compound 7, wherein the compound 4 has a structural formula shown in the description, the compound 5 has a structural formula shown in the description, the compound 6 has a structural formula shown in the description, the compound 7 has a structural formula shown in the description, R1 represents an alkyl group having 1 to 5 carbon atoms and R2 represents an alkyl group having 1 to 3 carbon atoms. The method has simple processes and a low cost, does not produce high salt wastewater, satisfies environmental protection requirements, is suitable for industrial production, and has high yield and content of the finished product.
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Paragraph 0056; 0057

(2017/08/28)

Purification method of glufosinate
The invention relates to a purification method of glufosinate. The method comprises the following steps: adding a glufosinate hydrochloride crude product into a solvent, adding amino acid and an aqueous solution of alkali, reacting for 0.5-1.5 h, adjusting pH of the reaction system to 1-7, filtering and drying to obtain glufosinate-ammonium acid; and dissolving glufosinate-ammonium acid in a solvent, introducing ammonia gas and carrying out a salt-forming reaction, precipitating a glufosinate solid, filtering and drying to obtain high-purity glufosinate. According to the purification technology, use of fatty amine which is hard to remove and high-risk oxirane and epoxypropane is avoided. The steps are simple. The obtained glufosinate has low content of inorganic salt, high purity, high yield and high safety. In addition, water or alcohol is used as a solvent in the technological process, and a neutralization reaction is carried out by the use of ammonia water and inorganic base. The purification method accords with the ecology and economy principle, and has a good industrial prospect. In addition, purification is carried out by addition of amino acid, and purification efficiency and product purity are higher.
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Paragraph 0033

(2016/11/02)

Purification method for glufosinate-ammonium
The invention relates to a purification method for glufosinate-ammonium. The method comprises the following steps that a glufosinate-ammonium hydrochloride crude product is dissolved into a solvent, then, alkaline is added to be subjected to a reaction, the pH value is adjusted to be 7-10, reduced pressure distillation is performed to remove some solvent, then filtering is performed to remove ammonium chloride and other undissolved substances; acid is added into the reaction solution to be subjected to a reaction, the pH value is adjusted to be 1-4.5, and then filtering and drying are performed to obtain glufosinate-ammonium acid; the glufosinate-ammonium acid is dissolved into the solvent, then, ammonia gas is introduced to be subjected to a salt forming reaction, glufosinate-ammonium solid is separated out, and filtering and drying are performed to obtain high-purity glufosinate-ammonium. According to the purification technology, fatty amine hard to remove and high-risk ethylene oxide and epoxypropane are prevented from being used, the steps are simple, the obtained glufosinate-ammonium is low in inorganic salt content and high in purity, yield and safety, water or alcohol is used as the solvent in the technological process, ammonium hydroxide and inorganic base are used for being subjected to a neutral reaction, the glufosinate-ammonium conforms to the environment-friendly and economical principle, and the good industrial prospect is achieved.
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Paragraph 0031

(2017/02/09)

Method for preparing high-purity glufosinate-ammonium by organic alkali process
The invention discloses a method for preparing high-purity glufosinate-ammonium by an organic alkali process. The method comprises the following steps: by using a glufosinate-ammonium hydrochloride solution as a raw material, filtering the raw material, concentrating, directly adding tertiary amine R1R2R3N1 into the concentrated solution under the heating condition of 60-80 DEG C, and keeping the temperature to carry out hydrochloric acid removal reaction; after the reaction finishes, cooling to -3 to -8 DEG C to precipitate a glufosinate-ammonium free acid crude product; adding alcohol into the crude product, pulping, and filtering, wherein the obtained filter cake is glufosinate-ammonium free acid; adding alcohol into the glufosinate-ammonium free acid, heating to 30-50 DEG C, introducing ammonia gas to react; and after the reaction finishes, cooling to crystallize, filtering, and drying to obtain the glufosinate-ammonium with the purity of at least 88%.
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Paragraph 0047

(2016/10/20)

Grass amine phosphine method for the preparation of
The invention discloses a Glufosinate-ammonium and its derivative improved preparation method, the method comprises the following steps: diethyl methyl-phoshphonite, acraldehyde and acetic anhydride are subjected to an addition reaction, a reactant, sodium cyanide (editpotassium cyanide for replacing) and an ammonia water solution of ammonium chloride are subjected to an improved STRECKER reaction without separation, the product is subjected to hydrolysis and ammonification for forming salt to obtain Glufosinate-ammonium. The preparation method has the characteristics of high selectivity and high yield.
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Paragraph 0025; 0035; 0044; 0045

(2017/04/28)

Purification method for glufosinate-ammonium
The invention relates to a purification method for glufosinate-ammonium. The method comprises the following steps that an acidolysis glufosinate-ammonium hydrochloride reaction solution is heated and distilled to remove low-boiling-point organic solvent and some water, and filtering is performed to remove some ammonium chloride and other insoluble impurities; the pH value of the filtrate is adjusted to be 1-5, and then filtering, washing and drying are performed to obtain glufosinate-ammonium acid; the glufosinate-ammonium acid is dissolved into the solvent, then, ammonia gas is introduced to be subjected to a salt forming reaction, glufosinate-ammonium solid is separated out, and then filtering, washing and drying are performed to obtain high-purity glufosinate-ammonium; the filtrate and glufosinate-ammonium hydrochloride reaction solution are combined. According to the purification technology, fatty amine hard to remove and high-risk ethylene oxide and epoxypropane are prevented from being used, the steps are simple, the obtained glufosinate-ammonium is low in inorganic salt content and high in purity, yield and safety, water or alcohol is used as the solvent in the technological process, ammonium hydroxide and inorganic base are used for being subjected to a neutral reaction, the glufosinate-ammonium conforms to the environment-friendly and economical principle, and the good industrial prospect is achieved.
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Paragraph 0045

(2017/01/02)

Purification method for glufosinate-ammonium
The invention relates to a purification method for glufosinate-ammonium. The method comprises the following steps that 1, a glufosinate-ammonium hydrochloride crude product is added into a solvent, then, an alkaline water solution is added to be subjected to a neutral reaction, the pH value of the reaction system is adjusted to be 1-4.5, and then filtering and drying are performed to obtain glufosinate-ammonium acid; 2, the glufosinate-ammonium acid obtained in the first step is dissolved into the solvent, then, ammonia gas is introduced to be subjected to a salt forming reaction, glufosinate-ammonium solid is separated out, and filtering and drying are performed to obtain high-purity glufosinate-ammonium. According to the purification technology, fatty amine hard to remove and high-risk ethylene oxide and epoxypropane are prevented from being used, the steps are simple, the obtained glufosinate-ammonium is low in inorganic salt content and high in purity, yield and safety, water or alcohol is used as the solvent in the technological process, ammonium hydroxide and inorganic base are used for being subjected to a neutral reaction, the purification method conforms to the environmental protection and economy principle, and the good industrial prospect is achieved.
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Paragraph 0031

(2016/12/07)

Grass ammonium phosphine method for the preparation of (by machine translation)
The invention relates to a preparation method of glufosinate. The preparation method comprises the following steps: with a compound represented by a formula (I) as a starting material, reacting the compound represented by the formula (I) with cyanide RCN to obtain ketone nitrile; then hydrolyzing ketone nitrile in the presence of an acidic substance and water so as to obtain ketoacid; and reacting ketoacid successively with ammonia gas and hydrogen under the action of a catalyst so as to obtain glufosinate; wherein the compound represented by the formula (I) is cyclic phosphonic acid anhydride. The preparation method in the invention has the advantages of simple process, convenient operation, high product purity, high yield, no need for repeated recrystallization, ect.; and the final product of the preparation method is directly glufosinate ammonium, the step of converting glufosinate chloride into glufosinate ammonium is omitted, so the method has great economic benefit and is suitable for industrialization production.
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Paragraph 0024; 0029; 0030

(2017/01/05)

Purification method for glufosinate-ammonium
The invention relates to a purification method for glufosinate-ammonium. The method comprises the following steps that a glufosinate-ammonium hydrochloride crude product is dissolved into a solvent, then, amino acid and alkaline are added to be subjected to a neutral reaction, the pH value is adjusted to be 7-10, reduced pressure distillation is performed to remove some solvent, then filtering is performed to remove ammonium chloride and other undissolved substances; acid is added into the reaction solution to be subjected to a reaction, the pH value is adjusted to be 1-4.5, and then filtering and drying are performed to obtain glufosinate-ammonium acid; the glufosinate-ammonium acid is dissolved into the solvent, then, ammonia gas is introduced to be subjected to a salt forming reaction, glufosinate-ammonium solid is separated out, and filtering and drying are performed to obtain high-purity glufosinate-ammonium. According to the purification technology, fatty amine hard to remove and high-risk ethylene oxide and epoxypropane are prevented from being used, the steps are simple, the obtained glufosinate-ammonium is low in inorganic salt content and high in purity, yield and safety, water or alcohol is used as the solvent in the technological process, ammonium hydroxide and inorganic base are used for being subjected to a neutral reaction, the glufosinate-ammonium conforms to the environment-friendly and economical principle, and the good industrial prospect is achieved.
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Paragraph 0027

(2016/11/07)

A novel procedure for the synthesis of ammonium glufosinate
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Li, Yi-Ming,Du, Xiao-Hua,Zhou, Qin-Hua,Chen, Shu-Da
p. 565 - 568
(2015/10/29)

USE OF GLYCEROL ETHERS AS ACTIVATORS OF THE BIOLOGICAL EFFECTS OF A HERBICIDE, FUNGICIDE OR INSECTICIDE SUBSTANCE
The invention relates to the use of glycerol ethers as agents that activate the biological effects of at least one substance selected from a herbicide, fungicide or insecticide. The invention essentially relates to the use of glycerol ether as an agent that activates the biological effects of at least one substance selected from a herbicide, or fungicide or insecticide, said glycerol ether having formula (1), wherein R1 represents an alkyl group having between 1 and 18 carbon atoms and R2 represents a hydrogen atom or an alkyl group having between 1 and 18 carbon atoms, preferably a methyl or ethyl group. The invention also relates to a phytosanitary composition containing one such glycerol ether, as well as to a phytosanitary treatment method using said composition.
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(2012/09/05)

SOLID AND WATER-SOLUBLE GLUPHOSINATE FOR HERBICIDE FORMULATION, PRODUCTION PROCESS THEREFOR, AND PROCESS FOR CONTROLLING WEEDS
The present invention provides active ingredients for agrochemical formulations, as well as the production processes therefor. The active ingredient of the invention is a dry, solid ammonium salt of gluphosinate, having high purity (95 to 100%) and low humidity (a solid/liquid/solid reaction between a solid ammonium salt and solid gluphosinate acid, both solids being dispersed in an organic liquid medium. The products of the invention are highly water-soluble and are useful for controlling crop weeds.
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Page/Page column 8-9

(2009/01/20)

Herbicidal mixtures having a synergistic effect
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.
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(2008/06/13)

Phenoxycarboxylic acid compounds and herbicide comprising it as active ingredient
A novel phenoxycarboxylic acid of formula (I) is disclosed. The compound is effective as herbicide for eradicating broad-leaved weeds. A combination of the phenoxylcarboxylic acid and a N-phosphonomethylglycine or a glufosinate which is known as a herbicide is very effective for eradicating both broad-leaved weeds and narrow-leaved weeds.
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(2008/06/13)