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    PROCESS FOR THE PREPARATION OF DIESTERS OF THIOCARBAMOYLMETHANEPHOSPHONIC ACID
    23.
    发明专利
    PROCESS FOR THE PREPARATION OF DIESTERS OF THIOCARBAMOYLMETHANEPHOSPHONIC ACID 未知

    公开(公告)号：CA2145373A1

    公开(公告)日：1995-10-12

    申请号：CA2145373

    申请日：1995-03-23

    Applicant: HOECHST AG

    Inventor： WEFERLING NORBERT ,  KLEINER HANS-JERG

    IPC: B01J31/02 ,  C07B61/00 ,  C07F9/40 ,  C07F9/6574

    Abstract: For the preparation of diesters of thiocarbamoylmethanephosphonic acid, of the formula (I) (I) in which R1 and R2 are an alkyl group of 1 to 8 carbon atoms, where R1 and R2 may be identical or different or may together form a ring, diesters of cyanomethanephosphonic acid, of the formula (II) (II) in which R1 and R2 are as defined above, are reacted with hydrogen sulfide at temperatures of from 0 to 130 the presence of from 0.5 to 5 mol, per mole of the compound of the formula (II), of a tertiary amine of the formula (III)

    Process for the preparation of tertiary phosphines
    24.
    发明专利
    Process for the preparation of tertiary phosphines 未知

    公开(公告)号：GB2262284B

    公开(公告)日：1995-05-31

    申请号：GB9225936

    申请日：1992-12-11

    Applicant: HOECHST AG

    Inventor： STELZER OTHMAR ,  LANGHANS KLAUS PETER ,  WEFERLING NORBERT

    IPC: C07F9/50 ,  C07F9/58

    Abstract: A process is specified for the preparation of tertiary phosphines of the formula R'PR2 or R2P-[CH2]3-PR2 in which R is an aryl, pyridyl or arylsulfonic acid group and R' is an aryl, pyridyl, arylsulfonic acid or n-butyl group, which comprises reacting phosphines of the formula HnPR''3-n or H2P-[CH2]3-PH2 in which R'' is hydrogen or an n-butyl, aryl or pyridyl group and n is 1 or 2 with a halogen compound of the formula X-R, in which R has the abovementioned meaning and X is fluorine, chlorine or bromine, in the presence of powdered potassium hydroxide and dimethyl sulfoxide and/or dimethoxyethane at temperatures between 0 and 100 DEG C., at least 1 mol of potassium hydroxide being used per mole of halogen compound.

    PROCESS FOR MAKING TERTIARY ALKYLPHOSPHINES
    25.
    发明专利
    PROCESS FOR MAKING TERTIARY ALKYLPHOSPHINES 未知

    公开(公告)号：CA1292016C

    公开(公告)日：1991-11-12

    申请号：CA544071

    申请日：1987-08-10

    Applicant: HOECHST AG

    Inventor： WEFERLING NORBERT ,  ELSNER GEORG ,  STEPHAN HANS-WERNER ,  FRORATH FRIEDRICH-KARL

    IPC: C07F9/50

    Abstract: PROCESS FOR MAKING TERTIARY ALKYLPHOSPHINES Tertiary alkylphosphines of the general formula R3P, in which R stands for identical or different, linear, unsubstituted alkyl groups having 3 to 20 carbon atoms, with the proviso however that one of the alkyl groups may be a secondary butyl group, are made by reacting hydrogen phosphide PH3 with an appropriate alkene or alkenes in stoichiometric excess, if desired, at elevated temperature and under increased pressure in contact with a radical-yielding agent. 2,2'-azobis-(2-me-thylbutyronitrile) is used as the radical-yielding agent in the absence of whatever alien solvent.

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