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    Aliphatic per:fluoro-ketone(s) prepn. - from per:fluoro-carboxylic acid salt and per:fluoro-acyl fluoride, useful as heat transfer media or lubricant
    1.
    发明专利
    Aliphatic per:fluoro-ketone(s) prepn. - from per:fluoro-carboxylic acid salt and per:fluoro-acyl fluoride, useful as heat transfer media or lubricant 未知

    公开(公告)号：DE2648123A1

    公开(公告)日：1978-04-27

    申请号：DE2648123

    申请日：1976-10-23

    Applicant: HOECHST AG

    Inventor： MARTINI THOMAS DR ,  KLUGE FRIEDHELM DR

    IPC: C07D319/12 ,  C07C49/175 ,  C07C45/205 ,  C07C49/16

    Abstract: Aliphatic perfluoroketones (I) are prepd. by reacting a perfluorocarboxylic acid salt R1-CO2M (II) with a perfluoroacyl fluoride R2-CO-F (III) in a polar aprotic solvent at 20-200 degrees C. In the formulae M is Li, Na, K, Rb, Cs or Ag; R1 is 2-50C perfluoroalkyl opt. contg. ether-O-function(s) R2 is 1-50C perfluoroalkyl opt. contg. ether-O-function(s). (II) may be prepd. from R1COF and a salt of formic or oxalic acid or of a Gp. IIIA to VIIA element oxyacid which is less strong than CF3CO2H, esp. M2CO3. Prepn. is in a polar aprotic solvent at 20-200 degrees C. Alternatively a mixt. of (II) and (III) may be prepd. from (R1CO)2O and an alkali metal fluoride. Perfluorolefins (which are difficult to obtain) are not used. High boiling (I) may be prepd. (I) are inert to acids, oxidants and heat. They may be used as heat transfer media or lubricants. In an example perfluoro-2,4-bis-(3,6-dimethyl-1,4-dioxanyl-2-oxylpentan-3-one was prepd. from potassium perfluoro- alpha-(3,6-dimethyl-1,4-dioxanyl-2-oxylpropionate and the corresp. perfluoroacyl fluoride in tetraglyme.

    Fluoro(chloro)alkoxy-(alkyl)-benzyl chlorides - inters for herbicides
    2.
    发明专利
    Fluoro(chloro)alkoxy-(alkyl)-benzyl chlorides - inters for herbicides 未知

    公开(公告)号：DE2150955A1

    公开(公告)日：1973-04-19

    申请号：DE2150955

    申请日：1971-10-13

    Applicant: HOECHST AG

    Inventor： ERTEL HARTMUT DR ,  KLUGE FRIEDHELM DR ,  HEUBACH GUENTHER DR

    IPC: C07C43/28

    Abstract: Title cpds. of formula (I): (in which Q is Cl; R1 is a haloalkoxy gp. with n = 1,2 or 3 C atoms and 2n F and/or Cl atoms, having 2 F atoms on the alpha-C atom; R2 is H, Cl or Me) are used as inters., e.g. for herbicides of formula (I) (in which Q is -S-CX-NR3R4) by reaction with salts of thiocarbamic acids of formula HS-CX-NR3R4 (in which X is O or S; R3 and R4 are 1-3C alkyl). Title cpds. may be prepd. by chlorination of a cpd. (II) of formula (I) (in which Q is H) with Cl2 under free radical conditions at 100-180 (140-160) degrees C, pref. in UV light and opt. in a solvent. (II) can prepd. by reacting corresp. cresol with olefin or CCl2F2 in the presence of alkali.

    5.
    发明专利
    未知

    公开(公告)号：DE2451493A1

    公开(公告)日：1976-05-06

    申请号：DE2451493

    申请日：1974-10-30

    Applicant: HOECHST AG

    Inventor： HALASZ SIGMAR-PETER VON DR ,  KLUGE FRIEDHELM DR

    IPC: C07C43/12 ,  C08G65/323

    Abstract: Perfluorinated ethers containing carboxylic acid fluoride groups and optionally units derived from hexafluoropropene epoxide or tetrafluoroethylene epoxide are reacted with fluorine at temperatures of from 50 DEG to 350 DEG C in the presence of metallic catalysts. During the reaction carbonyl difluoride is splitt off and an ether is obtained in high yield which is free of carboxylic acid fluoride groups. Metallic silver is well suited as catalyst.

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