IE33560L - Manufacture of chlorofluoropyridines - Google Patents

Manufacture of chlorofluoropyridines

Info

Publication number
IE33560L
IE33560L IE691311A IE131169A IE33560L IE 33560 L IE33560 L IE 33560L IE 691311 A IE691311 A IE 691311A IE 131169 A IE131169 A IE 131169A IE 33560 L IE33560 L IE 33560L
Authority
IE
Ireland
Prior art keywords
methyl
formamide
sept
reaction
parts
Prior art date
Application number
IE691311A
Other versions
IE33560B1 (en
Original Assignee
Ici 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 Ici Ltd filed Critical Ici Ltd
Publication of IE33560L publication Critical patent/IE33560L/en
Publication of IE33560B1 publication Critical patent/IE33560B1/en

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
    • C07D213/61—Halogen atoms or nitro radicals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)

Abstract

1,256,082. Fluoropyridines. IMPERIAL CHEMICAL INDUSTRIES Ltd. 16 Sept., 1969 [30 Sept., 1968], No. 46314/68. Heading C2C. Chlorine is replaced by fluorine as a substituent in a pyridine ring by reaction of a chloropyridine or chlorofluoropyridine with potassium fluoride in a polar aprotic solvent in the presence of 0À2 to 2À0 parts by volume water per 100 parts by volume of the solvent. Solvents specified are N-methyl-2-pyrrolidone, dimethyl sulphone, ethylene carbonate, formamide, N- methyl-acetamide, N-methyl-formamide, dimethyl formamide and tetramethylene sulphone. Reaction is preferably effected at 160‹ to 250‹ C. under reflux. The treatment of pentachloropyridine to give 3,5-dichloro-2,4,6-trifluoropyridine, 3-chloro-tetrafluoropyridine and 2-fluorotetrachloropyridine is exemplified. [GB1256082A]
IE1311/69A 1968-09-30 1969-09-19 Manufacture of chlorofluoropyridines IE33560B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46314/68A GB1256082A (en) 1968-09-30 1968-09-30 Manufacture of chlorofluoropyridines

Publications (2)

Publication Number Publication Date
IE33560L true IE33560L (en) 1970-03-30
IE33560B1 IE33560B1 (en) 1974-08-07

Family

ID=10440742

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1311/69A IE33560B1 (en) 1968-09-30 1969-09-19 Manufacture of chlorofluoropyridines

Country Status (5)

Country Link
CH (1) CH520672A (en)
DE (1) DE1949424A1 (en)
GB (1) GB1256082A (en)
IE (1) IE33560B1 (en)
ZA (1) ZA696805B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063872B1 (en) * 1981-04-27 1985-07-17 Imperial Chemical Industries Plc Process for the preparation of fluoromethyl pyridines and certain novel products obtained therefrom
EP0120575B1 (en) * 1983-02-18 1989-06-14 Nippon Shokubai Kagaku Kogyo Co., Ltd Organic fluorine compounds
US4746744A (en) * 1986-10-22 1988-05-24 The Dow Chemical Company Method of preparation of 3,5-dichloro-2,4,6-trifluoropyridine
EP0944564B9 (en) 1996-11-22 2005-01-19 Albemarle Corporation Halogen exchange reactions and uses thereof
US5824827A (en) * 1996-11-22 1998-10-20 Albemarle Corporation Halogen exchange reactions
US5789631A (en) * 1996-11-25 1998-08-04 Albemarle Corporation Production of perhalobenzenes
US5965781A (en) * 1997-11-21 1999-10-12 Albemarle Corporation Catalysis in halogen exchange reactions

Also Published As

Publication number Publication date
CH520672A (en) 1972-03-31
DE1949424A1 (en) 1970-04-23
IE33560B1 (en) 1974-08-07
ZA696805B (en) 1971-05-27
GB1256082A (en) 1971-12-08

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