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公开(公告)号:DE4446387A1
公开(公告)日:1996-06-27
申请号:DE4446387
申请日:1994-12-23
Applicant: BASF AG
Inventor: MERKLE HANS RUPERT DR , BRENNER KARL DR , FRETSCHNER ERICH , SCHOENHERR MICHAEL DR , GASTEL ANNE VAN
Abstract: A process is disclosed for preparing solid, free-flowing water-soluble salts of aryloxy-C1-C4-alkane carboxylic acids. Aryloxy-C1-C4-alkane carboxylic acids are reacted with a salt-forming base. Salts are formed in the melt in the presence or absence of an entrainer suitable for causing azeotropic water separation or in a solution in the presence of an entrainer suitable for causing azeotropic water separation. The entrainer is removed from the reaction mixture during or after the reaction and the solid salts are then isolated in the usual manner.
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公开(公告)号:DE59102161D1
公开(公告)日:1994-08-18
申请号:DE59102161
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.
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公开(公告)号:DK0402722T3
公开(公告)日:1994-02-28
申请号:DK90110517
申请日:1990-06-02
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.
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公开(公告)号:HUT58703A
公开(公告)日:1992-03-30
申请号:HU289291
申请日:1991-09-06
Applicant: BASF AG
Inventor: FRETSCHNER ERICH , MERKLE HANS RUPERT
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.
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公开(公告)号:ZA904430B
公开(公告)日:1992-02-26
申请号:ZA904430
申请日:1990-06-08
Applicant: BASF AG
Inventor: MERKLE HANS RUPERT , HANS RUPERT MERKLE , FRETSCHNER ERICH , ERICH FRETSCHNER
IPC: C07D231/06 , C07D231/12 , C07D
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.
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26.
公开(公告)号:PT1005462E
公开(公告)日:2007-01-31
申请号:PT98942624
申请日:1998-07-25
Applicant: BASF AG
Inventor: MERKLE HANS RUPERT , WOERZ OTTO , FRETSCHNER ERICH , HANSEN HANSPETER , MUELLER ALBRECHT , BENZ KURT
IPC: C07D285/16 , C07D285/24
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公开(公告)号:SK284454B6
公开(公告)日:2005-04-01
申请号:SK173199
申请日:1998-06-22
Applicant: BASF AG
Inventor: MERKLE HANS RUPERT , FRETSCHNER ERICH
IPC: C07D231/12 , C07D20060101 , C07D231/10
Abstract: Described is a method for the preparation of pyrazole derivatives of general formula (I) by reacting carbonyl compounds R-1-C(O)-CH(R2)-CH3 with hydrazine, its hydrate or its salts in 30 to 100 % by weight sulphuric acid in the presence of catalytic quantities of iodine or an iodine compound at a temperature of from 80 to 200 °C.
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公开(公告)号:ES2219935T3
公开(公告)日:2004-12-01
申请号:ES98967139
申请日:1998-06-22
Applicant: BASF AG
Inventor: MERKLE HANS RUPERT , FRETSCHNER ERICH
IPC: C07D231/12 , C07D20060101 , C07D231/10
Abstract: Procedimiento para la producción de derivados de pirazol de fórmula I **(fórmula)** en la que R1y R2 representan, independientemente el uno del otro, un grupo alquilo con de 1 a 8 átomos de carbono, un grupo cicloalquilo con de 3 a 8 átomos de carbono, un grupo arilo con de 6 a 14 átomos de carbono, un grupo fenil(alquilo con de 1 a 4 átomos de carbono) o tolilo, en lo que el grupo alquilo con de 1 a 8 átomos de carbono, el grupo cicloalquilo con de 3 a 8 átomos de carbono, el grupo arilo con de 6 a 14 átomos de carbono o el grupo fenil-(alquilocon de 1 a 4 átomos de carbono) pueden estar no sustituidos o sustituidos por uno o varios átomos de halógeno, grupos nitro, grupos sulfónico o grupos de ácido sulfónico, y R1 puede significar además también hidrógeno, caracterizado porque se hace reaccionar un compuesto carbonílico de fórmula II **(fórmula)** en la que R 1 y R 2 tienen los significados indicados anteriormente, con hidracina, hidrato de hidracina o una sal de adición ácida de éstos,en presencia de ácido sulfúrico a del 30 al 100% en peso y del 0, 05 al 5% en moles de yodo o un compuesto que libera yodo o ácido yodhídrico, referido al compuesto de hidracina, a temperaturas en el intervalo de 80 a 200ºC, con lo que el compuesto de hidracina y el compuesto carbonílico se utilizan en una relación molar desde 1:0, 8 hasta 1:1, 5.
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公开(公告)号:AU771700B2
公开(公告)日:2004-04-01
申请号:AU3433100
申请日:2000-03-30
Applicant: BASF AG
Inventor: MERKLE HANS RUPERT , HERBIG KLAUS , FRETSCHNER ERICH , FROHLICH HELMUT
IPC: C07D237/22
Abstract: In a process for preparing 4-amino-5-chloro-1-phenylpyridazin-6-one by reacting 4,5-dichloro-1-phenylpyridazin-6-one with aqueous ammonia in the presence of a catalyst, the catalyst used is soluble in the aqueous alkaline reaction medium but is essentially insoluble in the reaction medium which has been acidified after removal of the 4-amino-5-chloro-1-phenylpyridazin-6-one.The process of the present invention makes it possible for the catalyst to be recovered and reused in a simple manner.
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公开(公告)号:CA2423605A1
公开(公告)日:2003-03-25
申请号:CA2423605
申请日:2001-09-28
Applicant: BASF AG
Inventor: FRETSCHNER ERICH , MERKLE HANS RUPERT
IPC: C07D231/12 , C07D231/16 , C07D231/20 , C07D231/22 , C07D231/14
Abstract: The invention relates to a method for producing 1-substituted 5-chloro-4- methyl pyrazoles of general formula (I) wherein R has the designated cited i n claim 1. Said method reacts 4-methyl pyrazole of general formula (II) with chlorine, separating the mixture obtained from mono and dichlorinated products, by means of distillation subsequently dehalogenizing the dichlorinated compound to obtain compound II and re-introduction into the reaction with chlorine.
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