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    Cycloalkylidene - acetonitriles prodn - by condensing cycloalkanones with acetonitrile
    4.
    发明专利
    Cycloalkylidene - acetonitriles prodn - by condensing cycloalkanones with acetonitrile 未知

    公开(公告)号：DE2135666A1

    公开(公告)日：1973-01-25

    申请号：DE2135666

    申请日：1971-07-16

    Applicant: HOECHST AG

    Inventor： LEUPOLD ERNST ,  ARPE HANS-JUERGEN DIPL CHEM DR

    IPC: C07C255/45 ,  C07C121/48

    Abstract: Prepn. of cycloalkylideneacetonitriles (I) by reacting cycloalkanones with acetonitrile in the liquid phase in the presence of an azeotonitrile in the liquid phase in separate water and of catalytic amts. of alkali(ne earth) alcoholates, the alcohol component of which has a b.pt. which is higher (pref. by 50-150 degrees C) than the b.pt. of the lowest-boiling reaction component. (I) are of technical interest, since the activated double bond permits a number of reactions (e.g. Michael addition or similar reactions) leading to useful products (e.g. pharmaceuticals). Single-stage process (intermediate beta-hydroxynitriles not isolated). Alcohol from alcoholate catalyst does not distil from the reaction mixture, so that separated water is not solubilized.

    5.
    发明专利
    未知

    公开(公告)号：DE59007165D1

    公开(公告)日：1994-10-20

    申请号：DE59007165

    申请日：1990-11-20

    Applicant: HOECHST AG

    Inventor： LEUPOLD ERNST ,  ROSCHER GUENTER

    IPC: B01J23/40 ,  C07B61/00 ,  C07F9/40 ,  C07F9/6571

    Abstract: PCT No. PCT/EP90/01980 Sec. 371 Date May 22, 1992 Sec. 102(e) Date May 22, 1992 PCT Filed Nov. 20, 1990 PCT Pub. No. WO91/08210 PCT Pub. Date Jun. 13, 1991.A process for the preparation of diesters of carboxymethylphosphonic acid of the formula: (RO)2P(O)CH2CO2H, in which R is a straight-chain or branched alkyl radical having 1 to 20 carbon atoms, a cycloaliphatic radical having 5 to 8 carbon atoms, a phenyl or naphthyl radical which can be substituted, an aralkyl radical having 7 to 10 carbon atoms, or in which the (RO)2P group forms a ring having 2 to 5 carbon atoms which can be substituted, characterized in that dialkyl ester of 2-hydroxyethylphosphonic acid of the formula (RO)2P(O)CH2CH2OH, in which R has the abovementioned meaning, is reacted with oxygen in the presence of water and a catalyst which contains at least one metal selected from the platinum metals group.

    9.
    发明专利
    未知

    公开(公告)号：DE59006254D1

    公开(公告)日：1994-07-28

    申请号：DE59006254

    申请日：1990-10-18

    Applicant: HOECHST AG

    Inventor： SISTIG FRANK ,  LEUPOLD ERNST ,  LITTERER HEINZ

    IPC: B01J31/24 ,  C07B37/06 ,  C07B61/00 ,  C07C17/361 ,  C07C25/13 ,  C07C37/62 ,  C07C201/12 ,  C07C205/11 ,  C07C205/12

    Abstract: PCT No. PCT/EP90/01762 Sec. 371 Date Apr. 24, 1992 Sec. 102(e) Date Apr. 24, 1992 PCT Filed Oct. 18, 1990 PCT Pub. No. WO91/06518 PCT Pub. Date May 16, 1991.Process for the preparation of fluorobenzenes having at least one hydrogen atom as ring substituent and, optionally, further substituents, which, independently of each other, can be chlorine, bromine, nitro, hydroxyl, C1-C3-alkoxy or C1-C3-alkyl, the number of nitro groups being not more than 2 and the number of hydroxyl groups and alkoxy groups being not more than 3 in each case, by heating the corresponding benzaldehydes, substituted by at least one flourine atom, in the presence of a catalyst, characterized in that the reaction product is immediately removed from the reaction zone.

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