GB1469610A - Preparation of 3,6-dichloropicolinic acid - Google Patents

Preparation of 3,6-dichloropicolinic acid

Info

Publication number
GB1469610A
GB1469610A GB5274275A GB5274275A GB1469610A GB 1469610 A GB1469610 A GB 1469610A GB 5274275 A GB5274275 A GB 5274275A GB 5274275 A GB5274275 A GB 5274275A GB 1469610 A GB1469610 A GB 1469610A
Authority
GB
United Kingdom
Prior art keywords
acid
trichloro
dichloropicolinic
dec
dichloropicolinic acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5274275A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB1469610A publication Critical patent/GB1469610A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/79—Acids; Esters
    • C07D213/803—Processes of preparation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1469610 3,6-Dichloropicolinic acid DOW CHEMICAL CO 23 Dec 1975 [27 Dec 1974 (2)] 52742/75 Heading C2C 3,6-Dichloropicolinic acid is prepared by (1) reacting 3,5,6 - trichloro - 4 - hydrazinopicolinic acid with an alkali metal hydroxide in a liquid reaction medium comprising water and/or C 1-4 alkanol and (2) acidifying the reaction mixture with a mineral acid. Preferably step (1) is carried out at reflux temperature, e.g. 60- 120‹ C., using an excess of the alkali metal hydroxide such as NaOH in water/ethanol. Step (2) is preferably effected with HCl. 3,5,6 - Trichloro - 4 - hydrazinopicolinic acid is obtained (a) from tetrachloropicolinic acid and hydrazine in an aqueous alkaline medium or (b) by acidic hydrolysis of 3,5,6-trichloro-4-hydrazinopicolinonitrile. Pesticidal and plant growth regulant compositions contain 3,6 - dichloropicolinic acid obtained as above.
GB5274275A 1974-12-27 1975-12-23 Preparation of 3,6-dichloropicolinic acid Expired GB1469610A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53678874A 1974-12-27 1974-12-27
US53678974A 1974-12-27 1974-12-27

Publications (1)

Publication Number Publication Date
GB1469610A true GB1469610A (en) 1977-04-06

Family

ID=27065265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5274275A Expired GB1469610A (en) 1974-12-27 1975-12-23 Preparation of 3,6-dichloropicolinic acid

Country Status (13)

Country Link
JP (1) JPS5188971A (en)
AR (1) AR218217A1 (en)
BR (1) BR7508648A (en)
CA (1) CA1050989A (en)
CS (1) CS187331B2 (en)
DE (1) DE2558399C3 (en)
FR (1) FR2295952A1 (en)
GB (1) GB1469610A (en)
HU (1) HU173174B (en)
IN (1) IN140318B (en)
MY (1) MY7800020A (en)
NL (1) NL181358C (en)
PH (1) PH11766A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013159094A2 (en) 2012-04-20 2013-10-24 Merial Limited Improved processes for the preparation of 1-aryl-5-alkyl pyrazole compounds

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588235U (en) * 1981-07-09 1983-01-19 三洋電機株式会社 timer circuit
DE3600287A1 (en) 1986-01-08 1987-07-16 Bayer Ag 1-ARYLPYRAZOLE
CN105503713A (en) * 2015-12-24 2016-04-20 浙江埃森化学有限公司 Method for preparing 3,6-dichloro-pyridine-2-carboxylic acid through hydrogenation reduction of 3,4,5,6-tetrachloropyridine-2-carboxylic acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013159094A2 (en) 2012-04-20 2013-10-24 Merial Limited Improved processes for the preparation of 1-aryl-5-alkyl pyrazole compounds
EP3184510A1 (en) 2012-04-20 2017-06-28 Merial, Inc. Improved processes for the preparation of 1-aryl-5-alkyl pyrazole compounds

Also Published As

Publication number Publication date
NL181358C (en) 1987-08-03
DE2558399B2 (en) 1977-08-04
CS187331B2 (en) 1979-01-31
DE2558399A1 (en) 1976-07-01
JPS5188971A (en) 1976-08-04
AU8779275A (en) 1977-06-30
DE2558399C3 (en) 1978-03-30
MY7800020A (en) 1978-12-31
IN140318B (en) 1976-10-16
NL7514931A (en) 1976-06-29
BR7508648A (en) 1976-09-08
HU173174B (en) 1979-03-28
FR2295952A1 (en) 1976-07-23
AR218217A1 (en) 1980-05-30
PH11766A (en) 1978-06-27
JPS5337350B2 (en) 1978-10-07
CA1050989A (en) 1979-03-20
NL181358B (en) 1987-03-02
FR2295952B1 (en) 1978-05-19

Similar Documents

Publication Publication Date Title
GB1469610A (en) Preparation of 3,6-dichloropicolinic acid
GB1531706A (en) Process for producing carbohydrate-phenol condensation resins
GB1487842A (en) Prostenoic acids and process for their manufacture
GB1444565A (en) Process for conversion of alkyl transchrysantemates in admixture with alkyl cis-chrysanthemates to the corresponding acid
JPS5517339A (en) Preparation of thiourea dioxide
JPS56138151A (en) Preparation of beta-chloroalanine
JPS5668649A (en) Preparation of gamma-amino-beta-hydroxybutyric acid
JPS57142929A (en) Forming method of dipentaerythritol or ditrimethylolalkane as by-product at given ratio
JPS5549396A (en) Preparation of 17alpha-methylsteroid
GB1526272A (en) Manufacture of organic hydrazines
GB1278475A (en) PROCESS FOR THE PREPARATION OF METHYL p-AMINOBENZENESULPHONYLCARBAMATE
GB1199547A (en) Process for the Preparation of alpha-Ketoglutaric Acid.
GB1359523A (en) Benzalacetone amidinohydrazone derivatives and the production thereof
ES8506741A1 (en) Method for preparation of N-phosphonomethylglycine or salts.
GB1464832A (en) Process for the preparation of a-oxothiodimethylamides
JPS5794003A (en) Perfluorocarbon polymer and its production
JPS5714586A (en) Substituted benzaldehyde
GB1420523A (en) Preparation of phthalimide salts
GB2008097A (en) Method for producing 2,2,4- trimethyl-3- hydroxypentyl isobutyrate
GB1496953A (en) Process for the production of sulphonic acid hydroxy amides
GB1100315A (en) Improvements in the production of herbicides
JPS5583752A (en) Pyrazole derivative, and herbicide containing the same
JPS57206644A (en) Preparation of 4-(4- (anilino)phenoxy)-2-pentenoic acid derivative
JPS5512150A (en) Preparation of tartrazine
EP0111569A4 (en) Hydroxyalkanesulfonic acids and their derivatives, and process for their preparation.

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
704A Declaration that licence is not available as of right for an excepted use (par. 4a/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19951222