FR2063630A5 - 3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn - Google Patents

3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn

Info

Publication number
FR2063630A5
FR2063630A5 FR6936541A FR6936541A FR2063630A5 FR 2063630 A5 FR2063630 A5 FR 2063630A5 FR 6936541 A FR6936541 A FR 6936541A FR 6936541 A FR6936541 A FR 6936541A FR 2063630 A5 FR2063630 A5 FR 2063630A5
Authority
FR
France
Prior art keywords
prepn
hydroxypyridine
difluoro
dichloro
difluoropyrid
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
FR6936541A
Other languages
French (fr)
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to FR6936541A priority Critical patent/FR2063630A5/en
Application granted granted Critical
Publication of FR2063630A5 publication Critical patent/FR2063630A5/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D211/36—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members 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
    • C07D211/40—Oxygen atoms
    • C07D211/44—Oxygen atoms attached in position 4
    • C07D211/46—Oxygen atoms attached in position 4 having a hydrogen atom as the second substituent in position 4
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/68—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D211/72—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, directly attached to ring carbon atoms
    • C07D211/74—Oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/68—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D211/72—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, directly attached to ring carbon atoms
    • C07D211/74—Oxygen atoms
    • C07D211/76—Oxygen atoms attached in position 2 or 6

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Pyridine Compounds (AREA)

Abstract

(I) and its salts are prepd. by hydrolysis of the 2,4,6-trifluoro deriv. with aqs. sodium or potassium carbonate or bicarbonate at 90-100 degrees. The 2,4-difluoropyrid-6-one by product is removed by acid pptn. at pH 2.5, and (I) isolated by acidifying to pH 1.0. (I) is a herbicide.
FR6936541A 1969-10-24 1969-10-24 3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn Expired FR2063630A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR6936541A FR2063630A5 (en) 1969-10-24 1969-10-24 3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6936541A FR2063630A5 (en) 1969-10-24 1969-10-24 3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn

Publications (1)

Publication Number Publication Date
FR2063630A5 true FR2063630A5 (en) 1971-07-09

Family

ID=9042019

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6936541A Expired FR2063630A5 (en) 1969-10-24 1969-10-24 3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn

Country Status (1)

Country Link
FR (1) FR2063630A5 (en)

Similar Documents

Publication Publication Date Title
GB1265485A (en)
GB1415023A (en) Thiamphenicol derivatives
FR2063630A5 (en) 3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn
NL6915504A (en) 3,5-dichloro-2,6-difluoro-4-hydroxypyridine - prepn
GB1444565A (en) Process for conversion of alkyl transchrysantemates in admixture with alkyl cis-chrysanthemates to the corresponding acid
GB1359667A (en) Preparation of ypsilon-methyl glutamate
GB772345A (en) Improvements in or relating to preparation of polyvinylamine
GB1299543A (en) Process for the continuous production of pure sorbic acid
GB1367435A (en) Production of ypsilon-amino-beta-hydroxybutanoic acid
GB1260072A (en) Process for the production of 2-hydroxyquinoline-4-carboxylic acids and salts thereof
FR2041439A5 (en) Aminoethane sulphonate esters taurines - and betaines
GB1255153A (en) Manufacture of 3,5-dichloro-2,6-difluoro-4-hydroxypyridine and salts thereof
GB855504A (en) Preparation of 2-methyl-4-chloro-phenoxy alkanoic acids
GB1144968A (en) Improvements in or relating to the preparation of cyclohexylsulfamic acid
GB1166426A (en) Process for the Preparation of Pyridoxine-4,5-cyclic Monophosphate
IL33259A0 (en) Aqueous solutions of the potassium salt of alpha-(2 4-dichlorophenoxy)-propionic acid,their production and use as herbicides
GB987915A (en) Production of 2,4-diamino-6-hydroxypteridine
GB1290748A (en)
SE7409679L (en)
CA560328A (en) Continuous production of salts of hydroxy aliphatic sulfonic acids
GB1305120A (en)
JPS5222599A (en) Production of alkali hydroxide
GB771180A (en) 1,4-naphthoquinone addition product
GB973589A (en) Recovery of alkali metal salts of benzenecarboxylic acids
AU435257B2 (en) Aqueous solutions ofthe potassium salt of of (2, 4 dichlorophenoxy) propionic acid andthe production thereof

Legal Events

Date Code Title Description
ST Notification of lapse