公开(公告)号：PT820435E

公开(公告)日：2001-10-30

申请号：PT96910014

申请日：1996-03-25

Applicant: BASF AG

Inventor： BAYER HERBERT ,  SAUTER HUBERT ,  NORBERT GOTZ DR ,  MULLER RUTH ,  REMY BENOIT

IPC: C07B61/00 ,  C07C249/04 ,  C07D231/12 ,  C07C249/12 ,  C07C249/14 ,  C07C251/38 ,  C07C251/48 ,  C07C255/62 ,  C07D261/08

Abstract: PCT No. PCT/EP96/01306 Sec. 371 Date Oct. 7, 1997 Sec. 102(e) Date Oct. 7, 1997 PCT Filed Mar. 25, 1996 PCT Pub. No. WO96/32373 PCT Pub. Date Oct. 17, 1996A process for the preparation of largely isomerically pure alpha -bisoximes of the formula IaR1O-N=CR2-CR3=N-OR4Iawhere the groups R1O- and R2 on the N=C bond are cis to one another and where the radicals have the following meanings: R1 and R4 are hydrogen or a C-organic radical; R2 is hydrogen, cyano, nitro, hydroxyl, amino, halogen or an organic radical which can be bonded to the structure directly or via an oxygen, sulfur or nitrogen atom; R3 is hydrogen, cyano, nitro, hydroxyl, amino, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylthio, alkylamino, dialkylamino or cycloalkyl, from a mixture of the isomers of the a-bisoximes Ia and Ib is described.

公开(公告)号：PT994112E

公开(公告)日：2002-12-31

申请号：PT99117240

申请日：1999-09-02

Applicant: BASF AG

Inventor： HARTMANN HORST ,  NORBERT GOTZ DR ,  KONIG HARTMANN ,  MAYWALD VOLKER ,  REISSENWEBER GERNOT

IPC: C07D307/33 ,  C07D407/04

Abstract: Separation of impurities from 3-(2'-acetoxyethyl)-dihydro-2(3H)-furanone (I) obtained by acetylation of 3-(2'-hydroxyethyl)-dihydro-2(3H)-furanone comprises first separating high boiling impurities and subjecting the recovered distillation head product to a further step in which light and medium boiling components are taken off at the head and recovering pure (I) as the sump product.

公开(公告)号：PT823890E

公开(公告)日：2000-05-31

申请号：PT96914977

申请日：1996-04-23

Applicant: BASF AG

Inventor： SAUTER HUBERT ,  OBERDORF KLAUS ,  NORBERT GOTZ DR ,  GRAMMENOS WASSILIOS

IPC: C07C67/327 ,  C07C67/333 ,  C07C67/343 ,  C07C69/734

Abstract: PCT No. PCT/EP96/01689 Sec. 371 Date Oct. 9, 1997 Sec. 102(e) Date Oct. 9, 1997 PCT Filed Apr. 23, 1996 PCT Pub. No. WO96/34847 PCT Pub. Date Nov. 7, 1996A process for the preparation of essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonates of the formula Ia Ia where R is an aromatic radical and R' is a C1-C3-alkyl group, which comprises first converting a suitable methyl 2-(2-aryloxymethylenephenyl)- alpha -ketoacetate with an alkyl metal compound of the formula IIIM-CH2-R'IIIwhere M is a metal ion equivalent into the corresponding methyl 2-(2-aryloxymethylenephenyl)- alpha -hydroxybutyrate of the formula IV, subsequently dehydrating IV in the presence of an acid to give a mixture of methyl E- and Z-2-(2-aryloxymethylenephenyl)crotonates and, subsequently, converting this mixture in the presence of a base in an inert polar solvent into the essentially isomerically pure methyl E-2-(2-aryloxymethylenephenyl)crotonate Ia.

公开(公告)号：PT788475E

公开(公告)日：2000-04-28

申请号：PT95917966

申请日：1995-04-26

Applicant: BASF AG

Inventor： ALBRECHT HARREUS DR ,  HARTMANN HORST ,  NORBERT GOTZ DR ,  HARALD RANG DR ,  HEIMANN FRANK ,  BORCHERS DIRK ,  MAYWALD VOLKER ,  BUSCHULTE THOMAS

IPC: B01J23/02 ,  B01J31/02 ,  C07B61/00 ,  C07C239/20 ,  C07C249/12 ,  C07C251/54 ,  C07C309/66

Abstract: PCT No. PCT/EP95/01581 Sec. 371 Date Nov. 4, 1996 Sec. 102(e) Date Nov. 4, 1996 PCT Filed Apr. 26, 1995 PCT Pub. No. WO95/30648 PCT Pub. Date Nov. 16, 1995Preparation of mixtures of O-phenoxyalkylhydroxylamines Ia and Ib (Ia): H2NOCH2CH(R1)OAr (Ib): H2NOCH(R1)CH2OAr and the corresponding salt mixtures by a) converting mixtures of isomers of O-(2-hydroxyethyl)oximes IIa and IIb (IIa): (III): into a mixture of sulfonates IVa and IVb (IVa): (IVb): b) reacting this mixture of IVa and IVb with a phenol HO-Ar (V) to give a mixture of O-phenoxyalkoximes VIa and VIb (VIa): (VIb): c) hydrolyzing this mixture in the presence of an acid and, if desired d) liberating the O-phenoxyalkylhydroxylamines Ia and Ib from the resulting salts using a mineral acid. Compounds Ia/Ib and VIa/VIb are important intermediates for crop protection agents.