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    PROCESS FOR PREPARING PYRAZOLE AND DERIVATIVES THEREOF
    51.
    发明专利
    PROCESS FOR PREPARING PYRAZOLE AND DERIVATIVES THEREOF 未知

    公开(公告)号：CZ52096A3

    公开(公告)日：1996-05-15

    申请号：CZ52096

    申请日：1994-08-13

    Applicant: BASF AG

    Inventor： MERKLE HANS 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.

    The preparation of pyrazole and its derivatives
    52.
    发明专利
    The preparation of pyrazole and its derivatives 未知

    公开(公告)号：ZA946357B

    公开(公告)日：1996-02-22

    申请号：ZA946357

    申请日：1994-08-22

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  FRETSCHNER ERICH

    IPC: C07B35/04 ,  C07D231/12 ,  C07D521/00 ,  C07D

    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.

    53.
    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.

    PROCESS FOR PRODUCING PYRAZOLE AND ITS DERIVATIVES
    55.
    发明专利
    PROCESS FOR PRODUCING PYRAZOLE AND ITS DERIVATIVES 未知

    公开(公告)号：HUT54349A

    公开(公告)日：1991-02-28

    申请号：HU377590

    申请日：1990-06-08

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  FRETSCHNER ERICH

    IPC: C07D231/06 ,  C07D231/12 ,  C07D231/10 ,  C07B35/04

    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.

    58.
    发明专利
    未知

    公开(公告)号：DK1005462T3

    公开(公告)日：2007-03-26

    申请号：DK98942624

    申请日：1998-07-25

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  FRETSCHNER ERICH ,  WOERZ OTTO ,  HANSEN HANSPETER ,  MUELLER ALBRECHT ,  BENZ KURT

    IPC: C07D285/16 ,  C07D285/24

    Abstract: A process for preparing 3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide (I) or a salt of Iwhich comprises reacting anthranilic isopropylamide IIsimultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic basesandphosphorus oxychloride at from 50° C. to the reflux temperature, followed, if appropriate, by conversion into its salts, is described.

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