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    6.
    发明专利
    未知

    公开(公告)号：DE1037446B

    公开(公告)日：1958-08-28

    申请号：DEF0020038

    申请日：1956-04-13

    Applicant: HOECHST AG

    Inventor： CLAUSS DR KARL ,  BESTIAN DR HERBERT

    IPC: C07F7/28 ,  C07F17/00

    Abstract: The invention comprises organo-titanium compounds of formula: in which each R1 represents a cyclopentadienyl radical which may be substituted by one or more hydrocarbon radicals, R2 represents a saturated aliphatic hydrocarbon radical and Y is a saturated aliphatic hydrocarbon radical, an alkoxy group or a halogen atom (including pseudo-halogens) or another acid group. R2 may preferably contain 1 to 4 carbon atoms, and the other acid group may be sulphate or acetate. The preferred alkoxy groups are methoxy, ethoxy, propoxy and butoxy, and alkyl radicals such as ethylhexyl or dodecyl may be substituted into the alkoxy group. The compounds of the invention may be made by reacting a compound of formula (R1)2TiX2 where R2 is as above and X is halogen (or pseudo-halogen), alkoxy or another acid group, suitably in the presence of an inert diluent, with an alkyl of an alkali metal, alkaline earth metal, or of beryllium, magnesium, zinc or aluminium. Grignard compounds (magnesium alkyl halides) may also be used, as may aluminium sesquichlorides. Specified diluents include dimethyl, diethyl, dipropyl, diisopropyl and dibutyl ethers, tetrahydrofuran, dioxane, butane, pentane, hexane, heptane, octane, cyclohexane, cyclopentane, methylcylcohexane, methylcyclopentane, benzene fractions from petroleum or the Fischer-Tropsch synthesis, aromatic hydrocarbons such as benzene, toluene and xylene, amines such as trimethyl-, triethyl-and tripropylamine, and in some cases chlorinated hydrocarbons such as methylene chloride or chlorobenzene. The reaction is carried out under an atmosphere of nitrogen or other inert gas with the exclusion of moisture. Examples describe the preparation of (1) bis-(cyclopentadienyl) methyl titanium chloride, (2) bis (cyclopentadienyl) titanium dichloride, (3) bis (cyclopentadienyl) dimethyl titanium, (8) bis (cyclopentadienyl) n-propyl titanium chloride, (10) titanium bis (1-methyl-cyclopentadienyl) dimethyl and (11) bis (cyclopentadienyl) ethyl titanium chloride.

    Preparation of azetidinones
    10.
    发明专利
    Preparation of azetidinones 未知

    公开(公告)号：DE1807498A1

    公开(公告)日：1970-06-11

    申请号：DE1807498

    申请日：1968-11-07

    Applicant: HOECHST AG

    Inventor： BESTIAN DR HERBERT ,  JENSEN DR HARLAD

    IPC: C07D205/08

    Abstract: Azetidin-2-ones (I) are prepd. by treatment of similarly substd. N-benzyl-beta-lactams (II) with 2 atoms of Na, K or Li metal in liquid NH3 then liberating the lactam from its metal salt by addn. of NH4Cl to the soln. in liquid NH3. R'-R4 are H or C1-6 hydrocarbons or R2 + R3 may form part of a 5-8-membered ring. The method may be used for prepg. optically active lactams. The products are polymerisable to polyamides of the nylon-3 type.

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