GB1198476A - Preparation of Halopyridines - Google Patents

Preparation of Halopyridines

Info

Publication number
GB1198476A
GB1198476A GB2366967A GB2366967A GB1198476A GB 1198476 A GB1198476 A GB 1198476A GB 2366967 A GB2366967 A GB 2366967A GB 2366967 A GB2366967 A GB 2366967A GB 1198476 A GB1198476 A GB 1198476A
Authority
GB
United Kingdom
Prior art keywords
preparation
perhalopyridines
reaction medium
halopyridines
perfluorochloropyridine
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
GB2366967A
Inventor
Harold Crosbie Fielding
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 GB2366967A priority Critical patent/GB1198476A/en
Publication of GB1198476A publication Critical patent/GB1198476A/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

1,198,476. Preparation of perhalopyridines. IMPERIAL CHEMICAL INDUSTRIES Ltd. 29 April, 1968 [22 May, 1967], No. 23669/67. Addition to 1,004,375. Heading C2C. Perhalopyridines having the formula where n is 1 to 5 are prepared by heating a perfluorochloropyridine having fewer fluorine atoms in the molecule than the desired product, or pentachloropyridine with a dry alkali metal fluoride in a polar, aprotic, liquid, organic reaction medium at 180-250‹ C., the volatile reaction products after leaving the reaction medium being continuously condensed and returned thereto at a point below its surface. An example is given of the preparation of pentafluoropyridine and monochlorotetrafluoropyridine from dichlorotrifluoropyridine by reacting it with potassium fluoride in tetramethylene sulphone.
GB2366967A 1967-05-22 1967-05-22 Preparation of Halopyridines Expired GB1198476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2366967A GB1198476A (en) 1967-05-22 1967-05-22 Preparation of Halopyridines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2366967A GB1198476A (en) 1967-05-22 1967-05-22 Preparation of Halopyridines

Publications (1)

Publication Number Publication Date
GB1198476A true GB1198476A (en) 1970-07-15

Family

ID=10199375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2366967A Expired GB1198476A (en) 1967-05-22 1967-05-22 Preparation of Halopyridines

Country Status (1)

Country Link
GB (1) GB1198476A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270221A1 (en) * 1986-10-22 1988-06-08 Dowelanco Method of preparation of 3,5-dichloro-2,4,6-trifluoropyridine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270221A1 (en) * 1986-10-22 1988-06-08 Dowelanco Method of preparation of 3,5-dichloro-2,4,6-trifluoropyridine

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees