公开(公告)号：DE3835195A1

公开(公告)日：1990-04-19

申请号：DE3835195

申请日：1988-10-15

Applicant: BASF AG

Inventor： KOEHLER HERMANN DR ,  EBEL KLAUS DR ,  KARN HELMUT ,  TAUBITZ CHRISTOF DR

IPC: C07D233/54 ,  C07D233/64

Abstract: Process for the preparation of imidazoles substituted in the 2- and/or 4- and/or 5-position by p-nitrophenyl and, if appropriate, additional substituents by reaction of imidazoles substituted in the 2- and/or 4- and/or 5-position by phenyl and, if appropriate, additional substituents with mixtures of sulphuric acid and nitric acid, by carrying out the reaction in the presence of urea.

公开(公告)号：DE3400531A1

公开(公告)日：1985-07-18

申请号：DE3400531

申请日：1984-01-10

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  FRANK ANTON ,  KARN HELMUT

IPC: C07D233/60 ,  C07D233/92 ,  C07D233/94

公开(公告)号：DE2414280A1

公开(公告)日：1975-10-23

申请号：DE2414280

申请日：1974-03-25

Applicant: BASF AG

Inventor： FRANK ANTON ,  KARN HELMUT ,  DOCKNER TONI DIPL CHEM DR

IPC: C07D233/92

Abstract: 1-Alkyl-5-nitroimidazoles are prepared by reacting a 5-nitroimidazole with an alkylating agent in the presence of an aliphatic carboxylic acid. The products are intermediates for the production of dyes, textiles auxiliaries and insecticides.

公开(公告)号：DE2960134D1

公开(公告)日：1981-03-26

申请号：DE2960134

申请日：1979-01-11

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  FRANK ANTON ,  KEMPE UWE DR ,  WETZLER MATTHIAS ,  KARN HELMUT

IPC: C07D233/64 ,  A61K31/415 ,  C07D233/54 ,  C07D233/60 ,  C07D521/00 ,  C08G12/26 ,  C08G59/40 ,  C08G59/50 ,  C08K5/34 ,  C10L1/32

公开(公告)号：DE2825547A1

公开(公告)日：1979-12-20

申请号：DE2825547

申请日：1978-06-10

Applicant: BASF AG

Inventor： DOCKNER TONI DIPL CHEM DR ,  FRANK ANTON ,  KEMPE UWE DIPL CHEM DR ,  WETZLER MATTHIAS DIPL CHEM ,  KARN HELMUT

IPC: C07D233/64 ,  A61K31/415 ,  C07D233/54 ,  C07D233/60 ,  C07D521/00 ,  C08G12/26 ,  C08G59/40 ,  C08G59/50 ,  C08K5/34 ,  C10L1/32

公开(公告)号：DE2504479A1

公开(公告)日：1976-08-05

申请号：DE2504479

申请日：1975-02-04

Applicant: BASF AG

Inventor： KARN HELMUT ,  DOCKNER TONI DIPL CHEM DR ,  SCHOEPPL HUBERT DIPL CHEM DR ,  OPPENLAENDER KNUT DIPL CHEM DR ,  PAULUS GERHARD DIPL CHEM DR ,  QUEINS HUBERTUS DIPL CHEM DR

IPC: C08G8/04

Abstract: Prepn. of novolaks comprises reaction of an alkyl phenol with acetaldehyde in a mol. ratio of 1:0.3 to 1:1.5 in the presence of an acid catalyst. The alkyl phenol, in the absence of solvent, is mixed with catalyst and acetaldehyde is added continuously or intermittently so that the pressure is not >5 bar, until the desired mol. ratio is reached. The liq. reaction prod. are removed by heat and/or reduced pressure. The customary use of azeotropic distillation for water removal is omitted and no solvent recovery is involved. The procedure is simplified, yield is higher and effluent problems are diminished.

公开(公告)号：DE58906489D1

公开(公告)日：1994-02-03

申请号：DE58906489

申请日：1989-10-09

Applicant: BASF AG

Inventor： KOEHLER HERMANN DR ,  EBEL KLAUS DR ,  KARN HELMUT ,  TAUBITZ CHRISTOF DR

IPC: C07D233/54 ,  C07D233/64

Abstract: Process for the preparation of imidazoles substituted in the 2- and/or 4- and/or 5-position by p-nitrophenyl and, if appropriate, additional substituents by reaction of imidazoles substituted in the 2- and/or 4- and/or 5-position by phenyl and, if appropriate, additional substituents with mixtures of sulphuric acid and nitric acid, by carrying out the reaction in the presence of urea.

公开(公告)号：DE3729852A1

公开(公告)日：1989-03-23

申请号：DE3729852

申请日：1987-09-05

Applicant: BASF AG

Inventor： KOEHLER HERMANN DR ,  DOCKNER TONI DR ,  KARN HELMUT

IPC: C07D233/90

Abstract: Process for the preparation of 1-alkylimidazoles of the general formula (I) (I) where R1 is alkyl, R2 and R3 are hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, R4 is carboxy, alkoxycarbonyl R5OCC-, carbamoyl, or cyano, and R5 is an alkyl of from 1 to 8 carbon atoms-by the reaction of imidazoles of the general formula (II) (II) with dialkyl sulfates of the general formula (III) (R1O)2SO2 (III) at elevated temperatures in the presence of a carboxylic acid or anhydride or of both acid and anhydride.

公开(公告)号：DE3471100D1

公开(公告)日：1988-06-16

申请号：DE3471100

申请日：1984-12-15

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  FRANK ANTON ,  KARN HELMUT

IPC: C07D233/60 ,  C07D233/92 ,  C07D233/94

公开(公告)号：DE2343052A1

公开(公告)日：1975-03-27

申请号：DE2343052

申请日：1973-08-25

Applicant: BASF AG

Inventor： KARN HELMUT ,  SPAENIG HERMANN DIPL-CHEM DR

IPC: C07F5/06 ,  C07C111/00

Abstract: Prodn. of aluminium salt of N-nitroso-N-cyclohexyl-hydroxylamine by exchange reaction between an alkali salt of N-nitroso-N-cyclohexylhydroxylamine and an aluminium sal of a mineral acid, in soln. is improved in that a neutral soln. of the alkali salt and a strongly acidic soln. of the aluminium salt are mixed together. Under these conditions the formative of a by-prod. contg. a polyaluminate ion (as in the conventional process) is avoided.