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    93.
    发明专利
    未知

    公开(公告)号：ES2216045T3

    公开(公告)日：2004-10-16

    申请号：ES96905803

    申请日：1996-02-27

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  FRETSCHNER ERICH ,  SCHRODER JURGEN

    IPC: C07D231/12 ,  C07D521/00

    Abstract: PCT No. PCT/EP96/00790 Sec. 371 Date Aug. 20, 1997 Sec. 102(e) Date Aug. 20, 1997 PCT Filed Feb. 27, 1996 PCT Pub. No. WO96/27589 PCT Pub. Date Sep. 12, 1996A process for the preparation of an N-alkyl- or N-phenylalkyl-substituted pyrazole I by reacting the corresponding N-unsubstituted pyrazole II with an alcohol III of the formula R1-OH where R1 is the same alkyl or phenylalkyl group to be added to the unsubstituted nitrogen group -NH- of the pyrazole reactant. Both of the reactants, i.e. the pyrazole II and alcohol III compounds, are catalytically reacted in the liquid phase in a molar ratio of from 0.001:1 to 1:1, at temperatures of 50 DEG -400 DEG C. and under a subatmosheric pressure of from 0.8 bar up to a superatmospheric pressure of 250 bar. The catalyst required for this liquid phase reaction is selected as being at least one or more non-heterogeneous acid catalysts, their alkyl esters or their acid anhydrides.

    94.
    发明专利
    未知

    公开(公告)号：DK1021416T3

    公开(公告)日：2004-09-27

    申请号：DK98967139

    申请日：1998-06-22

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  FRETSCHNER ERICH

    IPC: C07D231/12 ,  C07D20060101 ,  C07D231/10

    Abstract: Pyrazole derivatives are prepared by reacting carbonyl compounds R1-C(O)-CH(R2)-CH2R3 with hydrazine, its hydrate or its salts in 30 to 100% by weight sulfuric acid in the presence of catalytic amounts of iodine or of an iodine compound.

    95.
    发明专利
    未知

    公开(公告)号：AT267173T

    公开(公告)日：2004-06-15

    申请号：AT98967139

    申请日：1998-06-22

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  FRETSCHNER ERICH

    IPC: C07D231/12 ,  C07D20060101 ,  C07D231/10

    Abstract: Pyrazole derivatives are prepared by reacting carbonyl compounds R1-C(O)-CH(R2)-CH2R3 with hydrazine, its hydrate or its salts in 30 to 100% by weight sulfuric acid in the presence of catalytic amounts of iodine or of an iodine compound.

    METHOD OF OBTAINING N-SUBSTITUTED PYRAZOLES
    96.
    发明专利
    METHOD OF OBTAINING N-SUBSTITUTED PYRAZOLES 未知

    公开(公告)号：PL183813B1

    公开(公告)日：2002-07-31

    申请号：PL32211496

    申请日：1996-02-27

    Applicant: BASF AG

    Inventor： MERKLE HANS R ,  FRETSCHNER ERICH ,  SCHROEDER JUERGEN

    IPC: C07D231/12 ,  C07D521/00

    Abstract: PCT No. PCT/EP96/00790 Sec. 371 Date Aug. 20, 1997 Sec. 102(e) Date Aug. 20, 1997 PCT Filed Feb. 27, 1996 PCT Pub. No. WO96/27589 PCT Pub. Date Sep. 12, 1996A process for the preparation of an N-alkyl- or N-phenylalkyl-substituted pyrazole I by reacting the corresponding N-unsubstituted pyrazole II with an alcohol III of the formula R1-OH where R1 is the same alkyl or phenylalkyl group to be added to the unsubstituted nitrogen group -NH- of the pyrazole reactant. Both of the reactants, i.e. the pyrazole II and alcohol III compounds, are catalytically reacted in the liquid phase in a molar ratio of from 0.001:1 to 1:1, at temperatures of 50 DEG -400 DEG C. and under a subatmosheric pressure of from 0.8 bar up to a superatmospheric pressure of 250 bar. The catalyst required for this liquid phase reaction is selected as being at least one or more non-heterogeneous acid catalysts, their alkyl esters or their acid anhydrides.

    METHOD OF OBTAINING OPTICALLY ACTIVE 2-HALOGENOPROPIONIC ACIDS
    97.
    发明专利
    METHOD OF OBTAINING OPTICALLY ACTIVE 2-HALOGENOPROPIONIC ACIDS 未知

    公开(公告)号：PL183495B1

    公开(公告)日：2002-06-28

    申请号：PL32146996

    申请日：1996-01-04

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  FRETSCHNER ERICH ,  HANSEN HANSPETER ,  ZIPPERER BERNHARD

    IPC: C07B57/00 ,  C07C51/09 ,  C07C51/487 ,  C07C53/19

    Abstract: PCT No. PCT/EP96/00012 Sec. 371 Date Jan. 7, 1997 Sec. 102(e) Date Jan. 7, 1997 PCT Filed Jan. 4, 1996 PCT Pub. No. WO96/22272 PCT Pub. Date Jul. 25, 1996The present invention relates to a process for the preparation of optically active 2-halopropionic acids, in which the corresponding optically active alkyl 2-halopropionates are caused to react with a carboxylic acid at elevated temperature in a transacylation reaction with the formation of the optically active 2-halopropionic acid and the alkyl carboxylate, and the optically active 2-halopropionic acid obtained is separated from the reaction mixture. The optically active products produced are important intermediates for the preparation of plant protectants and pharmaceuticals.

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