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GB1256082A - Manufacture of chlorofluoropyridines - Google Patents

Manufacture of chlorofluoropyridines

Info

Publication number
GB1256082A
GB1256082A GB46314/68A GB4631468A GB1256082A GB 1256082 A GB1256082 A GB 1256082A GB 46314/68 A GB46314/68 A GB 46314/68A GB 4631468 A GB4631468 A GB 4631468A GB 1256082 A GB1256082 A GB 1256082A
Authority
GB
United Kingdom
Prior art keywords
methyl
formamide
sept
reaction
parts
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
GB46314/68A
Inventor
Robert Roberts
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 GB46314/68A priority Critical patent/GB1256082A/en
Priority to IE1311/69A priority patent/IE33560B1/en
Priority to ZA696805*A priority patent/ZA696805B/en
Priority to CH1466769A priority patent/CH520672A/en
Priority to DE19691949424 priority patent/DE1949424A1/en
Publication of GB1256082A publication Critical patent/GB1256082A/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
    • C07D213/61—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.
GB46314/68A 1968-09-30 1968-09-30 Manufacture of chlorofluoropyridines Expired GB1256082A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB46314/68A GB1256082A (en) 1968-09-30 1968-09-30 Manufacture of chlorofluoropyridines
IE1311/69A IE33560B1 (en) 1968-09-30 1969-09-19 Manufacture of chlorofluoropyridines
ZA696805*A ZA696805B (en) 1968-09-30 1969-09-26 Manufacture of chlorofluoropyridines
CH1466769A CH520672A (en) 1968-09-30 1969-09-29 Process for the preparation of chlorofluoropyridines
DE19691949424 DE1949424A1 (en) 1968-09-30 1969-09-30 Process for the preparation of chlorofluoropyridines

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 (1)

Publication Number Publication Date
GB1256082A true GB1256082A (en) 1971-12-08

Family

ID=10440742

Family Applications (1)

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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4684734A (en) * 1983-02-18 1987-08-04 Nippon Shokubai Kk Co., Ltd. Method for manufacture or organic fluorine compounds
US4745193A (en) * 1981-04-27 1988-05-17 Imperial Chemical Industries Plc Process for the preparation of fluoromethylpyridines
US4746744A (en) * 1986-10-22 1988-05-24 The Dow Chemical Company Method of preparation of 3,5-dichloro-2,4,6-trifluoropyridine
US5789631A (en) * 1996-11-25 1998-08-04 Albemarle Corporation Production of perhalobenzenes
US5824827A (en) * 1996-11-22 1998-10-20 Albemarle Corporation Halogen exchange reactions
US5965781A (en) * 1997-11-21 1999-10-12 Albemarle Corporation Catalysis in halogen exchange reactions
US6241917B1 (en) 1996-11-22 2001-06-05 Albemarle Corporation Halogen exchange reactions in preparing catalysts and their precursors

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745193A (en) * 1981-04-27 1988-05-17 Imperial Chemical Industries Plc Process for the preparation of fluoromethylpyridines
US4684734A (en) * 1983-02-18 1987-08-04 Nippon Shokubai Kk Co., Ltd. Method for manufacture or 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
US5824827A (en) * 1996-11-22 1998-10-20 Albemarle Corporation Halogen exchange reactions
US6241917B1 (en) 1996-11-22 2001-06-05 Albemarle Corporation Halogen exchange reactions in preparing catalysts and their precursors
US6455718B1 (en) 1996-11-22 2002-09-24 Albemarle Corporation Halogen exchange reactions in preparing catalysts and their precursors
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
US6046358A (en) * 1997-11-21 2000-04-04 Albemarle Corporation Catalysis in halogen exchange reactions

Also Published As

Publication number Publication date
CH520672A (en) 1972-03-31
IE33560B1 (en) 1974-08-07
IE33560L (en) 1970-03-30
ZA696805B (en) 1971-05-27
DE1949424A1 (en) 1970-04-23

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