公开(公告)号：DE3700709A1

公开(公告)日：1988-07-21

申请号：DE3700709

申请日：1987-01-13

Applicant: BASF AG

Inventor： STEINIGER MICHAEL DR ,  HALBRITTER KLAUS DR

IPC: C25B3/23 ,  C25B3/02 ,  C08G65/32 ,  C08G65/20

Abstract: Process for producing (poly)oxatetramethylenedicarboxylic acids of the general formula HOOCC3H6(OC4H8)n-OC3H6COOH (I> in which n is an integer from 0 to 20, by electrolytic oxidation of polytetrahydrofurans of the general formula HOCH2C3H6(OC4H8)n-OC3H6CH2OH(II> in aqueous alkaline medium in the presence of an electrochemically regenerable redox catalyst.

公开(公告)号：DE3626227A1

公开(公告)日：1988-02-04

申请号：DE3626227

申请日：1986-08-02

Applicant: BASF AG

Inventor： HENKES ERHARD DR ,  HALBRITTER KLAUS DR ,  MAYR HERBERT PROF DR ,  STRIEPE WILHELM DR ,  POCK RUDOLF DR

IPC: C07C2/68 ,  C07C2/86 ,  C07C13/465 ,  C07C1/28

Abstract: Indanes are prepared by reacting substituted or unsubstituted benzyl halides with olefins in the presence of a Lewis acid as catalyst by reacting benzyl halides I I (where R1 and R2=hydrogen, alkyl, alkoxy, cycloalkyl, aryl, aryloxy, aralkyl R3=R1, halogen or an ortho-fused ring system X=halogen) with olefins II II (where R4 to R7=hydrogen or alkyl unbranched at alpha) in the presence of catalytic amounts of titanium tetrachloride.

公开(公告)号：DE3617177A1

公开(公告)日：1987-11-26

申请号：DE3617177

申请日：1986-05-22

Applicant: BASF AG

Inventor： ECKHARDT HEINZ DR ,  GRAMLICH WALTER DR ,  BEST WALTER DR ,  HALBRITTER KLAUS DR

IPC: B01J27/10 ,  B01J27/18 ,  B01J27/232 ,  B01J31/02 ,  C07B61/00 ,  C07D307/32 ,  C07D307/33 ,  C07D315/00 ,  C07D307/58

Abstract: gamma -butyrolactones of the general formula I (I) where R1 is hydrogen or alkyl of 1 to 4 carbon atoms which may be substituted by lower alkoxy or acyloxy and R2 is hydrogen or straight-chain or branched alkyl which is unsubstituted or substituted by a functional group or is aryl, are prepared by reacting an alkylene oxide of the general formula II (II) with an acylacetate of the general formla III (III) where R1 and R2 have the above meanings and R3 and R4 are each alkyl of 1 to 6 carbon atoms or aryl, and R4 may furthermore be hydrogen, in the presence of a catalyst at elevated temperatures, by a process in which the reaction is carried out in the presence of an alkali metal halide, of an ammonium halide, preferably a quaternary ammonium halide, of a phosphonium halide, of an alkali metal phosphate or of an alkali metal carbonate at from 20 DEG to 200 DEG C. and under from 1 to 50 bar.

公开(公告)号：DE3266652D1

公开(公告)日：1985-11-07

申请号：DE3266652

申请日：1982-06-01

Applicant: BASF AG

Inventor： ECKHARDT HEINZ DR ,  HALBRITTER KLAUS DR

IPC: B01J27/00 ,  C07B61/00 ,  C07D317/34

公开(公告)号：DE3307430A1

公开(公告)日：1984-09-06

申请号：DE3307430

申请日：1983-03-03

Applicant: BASF AG

Inventor： ECKHARDT HEINZ DR ,  HALBRITTER KLAUS DR

IPC: C07C109/087

Abstract: Preparation of N,N'-diformylhydrazine by reacting hydrazine with methyl formate in a ratio of 1 to 6 moles of methyl formate per mole of hydrazine at a temperature from 60 to 150 DEG C. The N,N'-diformylhydrazine, which can be prepared by the process of the invention, is a valuable starting material for the preparation of dyes and crop protection agents.

公开(公告)号：DE3229026A1

公开(公告)日：1984-02-09

申请号：DE3229026

申请日：1982-08-04

Applicant: BASF AG

Inventor： HALBRITTER KLAUS DR ,  EGGERSDORFER MANFRED DR

IPC: C07D307/60

Abstract: 1. A process for the preparation of 4,4-dimethyltetrahydrofuran-2,3-dione (I), wherein a dimethylpyruvate (II) is reacted with formaldehyde or a formaldehyde donor at 80-150 degrees C.

公开(公告)号：DE3062296D1

公开(公告)日：1983-04-14

申请号：DE3062296

申请日：1980-09-09

Applicant: BASF AG

Inventor： KROPP RUDOLF ,  FISCHER MARTIN DR ,  HALBRITTER KLAUS DR

IPC: C07D307/30 ,  C07D307/32 ,  C07D307/33

Abstract: Preparation of 5-(2,2-dihalovinyl)-4,4-dialkyl-tetrahydro-furan-2-ones of the formula I (I) where R1 and R2 are each alkyl of 1 to 4 carbon atoms and X is halogen, by reacting a carboxylic acid amide of the formula II (II) where R3 and R4 are each alkyl of 1 to 4 carbon atoms, aralkyl of 7 to 9 carbon atoms or aryl of 6 to 10 carbon atoms, or together with the nitrogen form a 5-membered or 6-membered saturated ring which may contain a second hetero-atom, with a carbon tetrahalide of the formula III CX4 (III) to give an iminium salt of the formula IV (IV) and then hydrolyzing the iminium salt; and novel iminium salts of the formula IV.