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    2.
    发明专利
    未知

    公开(公告)号：AT108443T

    公开(公告)日：1994-07-15

    申请号：AT91114026

    申请日：1991-08-22

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT DR ,  FRETSCHNER ERICH

    IPC: B01J27/06 ,  C07B61/00 ,  C07D231/12 ,  C07D521/00

    Abstract: Production of 3-methylpyrazole and its derivatives by reacting butenediols or ethynylalkylcarbinols or their acylates in 30 to 100% by weight of sulphuric acid, with optionally substituted hydrazine or its salts, in the presence of catalytic amounts of iodine or of an iodine compound.

    4.
    发明专利
    未知

    公开(公告)号：DE19505036A1

    公开(公告)日：1996-08-22

    申请号：DE19505036

    申请日：1995-02-15

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT DR ,  DUREIN ALFONS ,  HANSEN HANSPETER DR ,  JAEGER KARL-FRIEDRICH DR

    IPC: A01N43/00 ,  C07D285/16 ,  A01N43/88

    Abstract: A process for producing salts of 3-isopropyl-2,1,3-benzothiadiazine-4-on-2,2-dioxide of general formula (I) (R -R = H, lower alkyl, lower hydroxyalkyl) by reacting bentazone (IIa) in an organic solvent with an amine (IIIa), reacting bentazone (IIa) in an organic solvent virtually immiscible with water with an amine (IIIa) or an ammonium salt (IIIb) and taking salt (I) up in water or reacting bentazone (IIa) with an ammonium salt (IIIb) or sodium bentazone (IIb) with an ammonium salt (IIIc) in water.

    5.
    发明专利
    未知

    公开(公告)号：DE19500838A1

    公开(公告)日：1996-07-18

    申请号：DE19500838

    申请日：1995-01-13

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT DR ,  FRETSCHNER ERICH

    IPC: C07D231/12

    Abstract: A process for producing 3,5-diaryl pyrazolene of general formula (I), where R and R are possibly substituted aryl radicals, R is hydrogen, C1-C8 alkyl and possibly substituted aryl, in which hydrazine hydrate is reacted with 1,3 diaryl propenonene of general formula (II), where R , R and R have the above meanings, in sulphuric acid in the presence of iodine or an iodine compound.

    PROCESS FOR PREPARING PYRAZOLES
    7.
    发明专利
    PROCESS FOR PREPARING PYRAZOLES 未知

    公开(公告)号：CZ279830B6

    公开(公告)日：1995-07-12

    申请号：CS286290

    申请日：1990-06-08

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT DR ,  FRETSCHNER ERICH

    IPC: C07D231/06 ,  C07D231/12

    Abstract: Pyrazole and its derivs. (I) are produced by dehydrogenation of the corresp. 2-pyrazoline (II) with the aid of sulphuric acid in the presence of iodine or an iodine cpd. (III) at 50-250 deg.C. (II) is produced in situ in the reaction medium by reaction of glycerol or acrolein or a deriv. thereof with hydrazine or a hydrazine deriv.; amt. of (III) is 0.01-10 mol. equiv. w.r.t. (II) or the corresp. hydrazine; 30-99 wt.% H2SO4 is used.

    9.
    发明专利
    未知

    公开(公告)号：DE4328228A1

    公开(公告)日：1995-03-02

    申请号：DE4328228

    申请日：1993-08-23

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT DR ,  FRETSCHNER ERICH

    IPC: C07B35/04 ,  C07D231/12 ,  C07D521/00

    Abstract: PCT No. PCT/EP94/02708 Sec. 371 Date Feb. 15, 1996 Sec. 102(e) Date Feb. 15, 1996 PCT Filed Aug. 13, 1994 PCT Pub. No. WO95/06036 PCT Pub. Date Mar. 2, 1995A process for preparing pyrazole and its derivatives of the formula I I where R1, R2, R3 and R4 are each hydrogen, halogen, nitro, carboxyl, sulfonyl or C-organic radicals, from alpha,beta-unsaturated carbonyl compounds of the formula II II and hydrazine or hydrazine derivatives of the formula III H2N-NHR4 III wherein, initially without additional diluent, an alpha,beta-unsaturated carbonyl compound of the formula II is reacted with hydrazine or a hydrazine derivative of the formula III, and the resulting reaction mixture is reacted in another step with a mixture of sulfuric acid and iodine or a compound which liberates iodine or hydrogen iodide.

    Process for the preparation of N-substituted pyrazoles
    10.
    发明专利
    Process for the preparation of N-substituted pyrazoles 未知

    公开(公告)号：DE4318960A1

    公开(公告)日：1994-12-15

    申请号：DE4318960

    申请日：1993-06-08

    Applicant: BASF AG

    Inventor： EBEL KLAUS DR ,  SCHROEDER JUERGEN DR ,  GROENING CARSTEN DR ,  DOCKNER TONI DR ,  MERKLE HANS RUPERT DR

    IPC: C07D231/12 ,  C07D521/00

    Abstract: Process for the preparation of N-substituted pyrazoles of the formula I in which R is C1- to C12-alkyl or C7- to C20-phenylalkyl and R , R and R independently of one another are hydrogen, C1- to C12-alkyl or C7- to C20-phenylalkyl by reaction of pyrazoles of the formula II in which R , R and R have the abovementioned meanings, with compounds of the formula III R - O - R in which R has the abovementioned meanings and R is hydrogen or R , in the presence of a catalyst at temperatures from 200 to 550 DEG C and pressures from 0.001 to 50 bar by employing a heterogeneous catalyst as the catalyst.

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