公开(公告)号：DE3045370A1

公开(公告)日：1982-07-01

申请号：DE3045370

申请日：1980-12-02

Applicant: BASF AG

Inventor： DEGNER DIETER DIPL CHEM DR ,  BARL MANFRED DIPL CHEM DR

IPC: C25B3/29 ,  C07C43/305 ,  C07C50/04 ,  C25B3/23 ,  C25B3/02

Abstract: 1. A process for the preparation of a mixture of ketals of trimethyl-p-benzoquinone, of the formula see diagramm : EP0053261,P4,F2 where R**1 and R**2 are alkyl of 1 to 4 carbon atoms and R**3 is R**2 O, or the two radicals R**3 together are oxygen, wherein an alkyl trimethylphenyl ether of the formula see diagramm : EP0053261,P4,F3 is oxidized electrochemically in the presence of an alkanol of the formula R**2 OH.

公开(公告)号：DE2915736A1

公开(公告)日：1980-11-06

申请号：DE2915736

申请日：1979-04-19

Applicant: BASF AG

Inventor： PUETTER HERMANN DIPL CHEM DR ,  EILINGSFELD HEINZ DIPL CHEM DR ,  DEGNER DIETER DIPL CHEM DR

IPC: C07C46/02 ,  C25B1/00 ,  C07C50/10 ,  C07C45/00 ,  C07C46/06

Abstract: In the prepn. of naphthoquinone derivs. of formula (I), a 1-naphthol derivs. of formula (II) is treated with a cerium IV salt in the presence of water at up to 100 degrees C: In the formulae, R1-4 are H, halogen, 1-4C alkyl, COOM, SO3H, CN or acyl, and R3 and R4 can also be 1-3C alkoxy or NO2; and X is H, 1-4C alkyl, phenyl, OCH3, OC2H5, a group -NR5R6 (in which R5 and R6 are H or 1-4C alkyl and R6 can also be phenyl) or a gp. of formula (III). (I) are useful as intermediates for vitamins and dyestuffs. They are also useful as intermediates for anthraquinones (c.f. Chem. Eng. 1978, 18, 74C). (I) are obtd. smoothly and in high space-time yields.

公开(公告)号：DE2360494A1

公开(公告)日：1975-06-12

申请号：DE2360494

申请日：1973-12-05

Applicant: BASF AG

Inventor： DEGNER DIETER DIPL CHEM DR

IPC: C25B3/23 ,  C25B3/00 ,  C07C39/08

Abstract: Alkylhydroquinones of formula: (where R is 1-4C alkyl; and n is 1-3), are prepd. by electrolytic oxidn. of alkylphenols of formula: and then electrochemically reducing the formed alkylquinones in the presence of an aq. soln. of an electrolyte and a water-sol. ketone. Used as polymsn. inhibitors, and for the prepn. of dyes, plant protection agents, and substances with biological activity, e.g., vitamin E. Prodts. of >90% purity are obtd.

公开(公告)号：DE3127242A1

公开(公告)日：1983-01-20

申请号：DE3127242

申请日：1981-07-10

Applicant: BASF AG

Inventor： DEGNER DIETER DIPL CHEM DR ,  HOFFMANN WERNER DIPL CHEM DR ,  THOEMEL FRANK DIPL CHEM DR

IPC: C07D315/00 ,  C25B3/25 ,  C25B3/04

Abstract: Cyclopentadecanolide of the formula I I is prepared by a process wherein 12-oxocyclopentadecanolide of the formula II is reduced electrochemically.

公开(公告)号：DE3028502A1

公开(公告)日：1982-03-04

申请号：DE3028502

申请日：1980-07-26

Applicant: BASF AG

Inventor： THOEMEL FRANK DIPL CHEM DR ,  HOFFMANN WERNER DIPL CHEM DR ,  DEGNER DIETER DIPL CHEM DR

IPC: A61K8/49 ,  A61Q17/04 ,  C07D307/58 ,  A61K7/42

公开(公告)号：DE2904315A1

公开(公告)日：1980-08-14

申请号：DE2904315

申请日：1979-02-05

Applicant: BASF AG

Inventor： BARL MANFRED DIPL CHEM DR ,  DEGNER DIETER DIPL CHEM DR ,  SIEGEL HARDO DIPL CHEM DR

IPC: C07C45/51 ,  C07C45/67 ,  C07C45/84 ,  C07C47/56 ,  C07C45/00

Abstract: In a new process for the prodn. of p-hydroxybenzaldehyde, p-benzyloxy-benzaldehyde derivs. of formula PhCH2OAr are treated with an aq. hydrohalic acid at 70-130 degrees C: Ar is p-formyl-phenyl or its acetal with 1-3C alkyl gps. Reaction temp. is pref. 90-120 degrees C. Suitable hydrohalic acids are HCl and HBr with a concn. of e.g. 5-30 wt.% (the concn. pref. being less than that of the constant boiling mixt. with water). The aq. hydrohalic acid is generally used in an amt. of 3-20 times the wt. of benzoaldehyde deriv. Reaction time is generally 3-20 hrs. Benzyl halide formed as byproduct is advantageously removed from the reaction mixt. by azeotropic distn. with the aq. hydrohalic acid. The single-step process gives prod. of excellent quality in good yields.

公开(公告)号：DE2601543A1

公开(公告)日：1977-07-21

申请号：DE2601543

申请日：1976-01-16

Applicant: BASF AG

Inventor： DEGNER DIETER DIPL CHEM DR ,  RENTZEA COSTIN DIPL ING DR

IPC: C07D307/32 ,  C25B3/23 ,  C25B3/00

Abstract: In the parent patent, electrochemical prodn. of alkanoic esters (I) by anodic acyloxylation is carried out with aromatic (heterocyclic) cpds. (II) and low-mol. alkanoic acids (III) in the presence of a conductive salt (IV) of the formula (R1R2R3NH) circled positive (OOCR4) circled negative (in which R1, R2, and R3 are 1-8C alkyland one of these can be H; R4 is H is H or1-6C alkyl) and (IV) is recovered by distn. The improvement comprises the use of a furan cpd. of the formula (V) (in which R5 and R6 are H, alkyl, alkoxy, acyloxy, acylamino, hydroxymethyl or carboxyl gps). instead of (II). The mixt. obtd. can be worked up by simple distn. The 2,5-diacyloxy-2,5-dihydrofurans obtd. are ring-closed maleic dialdehyde (derivs.) which can be used as highly reactive cross-linking systems and are also valuable intermediates for the prodn. of pharmaceuticals e.g. for the synthesis of tropinones. In an example, 2,5-diacetoxy-2,5-dihydrofuran was prepd. by anodic acetoxylation of furan with AcOH contg. NMe3.

公开(公告)号：DE2408532A1

公开(公告)日：1975-09-04

申请号：DE2408532

申请日：1974-02-22

Applicant: BASF AG

Inventor： HERBIG KLAUS DIPL CHEM DR ,  WIERSDORFF WALTER-WIELANT DIPL ,  DEGNER DIETER DIPL CHEM DR

IPC: C07D295/023 ,  C25B3/25 ,  C07D295/00 ,  C07D223/02

Abstract: Aza-cycloalkanes, pref. of Formula (I) (where n is 3-11 and the ring may be substd. by 1 or more alkyl residues and/or an aryl residue, which may be fused onto the ring) (e.g. hexamethyleneimine), are prepd. by cathodic reduction of lactin O-alkyl ether salts, pref. cpds. of formula (II) (where R is alkyl and X is SO4R or BF4), and opt. converting the resulting salts into the corresponding free bases. The products are useful as intermediates, e.g. for plant-protection agents (herbicides) or pharmaceuticals. The process gives good material and current yields. Since the lactin O-alkyl ether salts are electrically conductive, an electrolyte salt is not necessary (even when an aprotic solvent is used).

公开(公告)号：DE3107147A1

公开(公告)日：1982-09-09

申请号：DE3107147

申请日：1981-02-26

Applicant: BASF AG

Inventor： BARL MANFRED DIPL CHEM DR ,  SIEGEL HARDO DIPL CHEM DR ,  DEGNER DIETER DIPL CHEM DR ,  MERCKER HANS JOCHEN DIPL CHEM

IPC: C07C43/23 ,  B01J23/00 ,  C07C41/00 ,  C07C41/28 ,  C07C43/295 ,  C07C45/51 ,  C07C67/00 ,  C07C41/18

公开(公告)号：DE3002543A1

公开(公告)日：1981-07-30

申请号：DE3002543

申请日：1980-01-25

Applicant: BASF AG

Inventor： DEGNER DIETER DIPL CHEM DR ,  PANDER HANS JOACHIM ,  SIEGEL HARDO DIPL CHEM DR

IPC: C07C255/43 ,  C07C67/00 ,  C07C229/36 ,  C07C253/00 ,  C07C255/24 ,  C07C255/58 ,  C07C255/59 ,  C07C121/80 ,  C07C101/72

Abstract: 4-Tert.-butoxyphenylglycinonitrile (I) I and a process for the preparation of D-(-)-4-hydroxyphenylglycine (IIa) and L-(+)-4-hydroxyphenylglycine (IIb) wherein compound I is reacted in a conventional manner, in alcoholic solution and in the presence of a carbonyl compound, with about the equimolar amount of L-(+)-tartaric acid or D-(-)-tartaric acid and the D-(-)-I-L-(+)-tartrate or L-(+)-I-D-(-)-tartrate thereby obtained in crystalline form is converted to IIa or IIb respectively in aqueous acid solution at 20 DEG -110 DEG C. by splitting off the L-(+)-tartaric acid or D-(-)-tartaric acid, hydrolyzing the nitrile group and hydrolytically splitting off the tert.-butyl group.