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    CYANOMETHYL ACID HALIDES OF PHOSPHORUS, PROCESS FOR THEIR PREPARATION AND THEIR PRECURSORS, ALKYL ESTERS OF CYANOMETHYL-METHYLPHOSPHINIC ACID
    41.
    发明专利
    CYANOMETHYL ACID HALIDES OF PHOSPHORUS, PROCESS FOR THEIR PREPARATION AND THEIR PRECURSORS, ALKYL ESTERS OF CYANOMETHYL-METHYLPHOSPHINIC ACID 未知

    公开(公告)号：CA1304393C

    公开(公告)日：1992-06-30

    申请号：CA560891

    申请日：1988-03-09

    Applicant: HOECHST AG

    Inventor： KLEINER HANS-JERG

    IPC: C07F9/32 ,  C07F9/34 ,  C07F9/42 ,  C07F9/30

    Abstract: 23221-4459 Novel compounds of the general formula I (I) in which R1 represents Hal or C1-C3-alkyl and Hal represents a halogen having an atomic weight of 35 to 80 are disclosed. Also disclosed is a process for the preparation of such compounds by reacting a compound of the general formula II (II) in which R2 represents C1-C3-alkyl or OR3 and R3 represents C1-C8-alkyl, preferably C1-C3-alkyl, with an acid chloride of the formula MHal2 (III), in which M represents SO, CO or PHal3 and Hal represents a halogen having an atomic weight from 35 to 80, which process, if M is CO, is carried out in the presence of a catalyst which is customary for the phosgenation of diesters of phosphonic acid. The compounds of the invention are useful as intermediates for the preparation of aminocarbonylmethyl phosphonic acid and alkyl-aminocarbonylmethylphosphinic acids.

    PROCESS FOR THE PREPARATION OF DIALKYL VINYLPHOSPHONATES
    42.
    发明专利
    PROCESS FOR THE PREPARATION OF DIALKYL VINYLPHOSPHONATES 未知

    公开(公告)号：CA1297494C

    公开(公告)日：1992-03-17

    申请号：CA560543

    申请日：1988-03-04

    Applicant: HOECHST AG

    Inventor： ROSCHER GUENTER ,  KLEINER HANS-JERG ,  IHL GABRIELE ,  LEIPE HERMANN

    IPC: C07B61/00 ,  C07F9/40

    Abstract: HOE 87/F 065 : A process for the production of dialkyl esterr of vinyl phosphonic acid which comprises subjecting dialkyl esters of 2-acetoxyethane phosphonic acid to cleavage by contacting with a liquid catalytically acting medium at a temperature in the range from 150 to 270.degree.C and under a pressure such that the partial pressures of the total of the components of the reaction system is in the range from 1 to 500 mbar, and drawing off the resultlng dialkyl esters of vinyl phosphonic acid and other volatile reaction products.

    50.
    发明专利
    未知

    公开(公告)号：NO895141L

    公开(公告)日：1990-06-22

    申请号：NO895141

    申请日：1989-12-20

    Applicant: HOECHST AG

    Inventor： BOEHSHAR MANFRED ,  KLEINER HANS-JERG ,  WALDMANN KARL ,  PFAHLER GERHARD

    IPC: C09K15/32 ,  C07F3/02 ,  C07F9/40 ,  C07F9/48 ,  C08K5/53 ,  C08K5/5393 ,  C08L23/00 ,  C08L23/02

    Abstract: Process for the preparation of organophosphorus derivatives of 2,4-di-t-butylphenol having a high content of organophosphorus derivatives of biphenyl, characterised in that, in the first step, a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35 is reacted under Grignard conditions with magnesium to give the corresponding Grignard compound, which is further reacted, in a second step, with bis(2,4-di-t-butylphenyl) chlorophosphite of the formula IV … … to form a mixture in which at least 50% by weight of the phosphorus is bound in the form of tetrakis(2,4-di-t-butylphenyl)-4,4'-biphenylene diphosphonite of the formula I … … the bonding of the phosphorus being determined by P-NMR analysis. … The invention furthermore relates to a polyolefin moulding composition which contains tetrakis(2,4-di-t-butylphenyl)- 4,4'-biphenylene diphosphonite of the formula I prepared by reacting a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35, with magnesium to give the Grignard compound and subsequent reaction thereof with bis(2,4-di-t-butylphenyl) chlorophosphite. … The moulding composition has improved properties compared with moulding compositions which contain said phosphonite prepared in accordance with the prior art. … The invention also relates to a process for the preparation of 4,4'-dihalomagnesium compounds of biphenyl by reacting a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35 with magnesium in the absence of an entrainer, in which process a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35 is reacted with finely divided magnesium kept in suspension.

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