公开(公告)号：ES2181347T3

公开(公告)日：2003-02-16

申请号：ES99117240

申请日：1999-09-02

Applicant: BASF AG

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

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：CZ9700037A3

公开(公告)日：1998-06-17

申请号：CZ3797

申请日：1995-06-21

Applicant: BASF AG

Inventor： MULLER BERND DR ,  KONIG HARTMANN DR ,  KIRSTGEN REINHARD DR ,  OBERDORF KLAUS DR ,  ROHL FRANZ DR ,  GOTZ NORBERT DR ,  SAUTER HUBERT DR ,  LORENZ GISELA DR ,  AMMERMANN EBERHARD DR

IPC: C07D231/06 ,  A01N20060101 ,  A01N43/40 ,  A01N47/22 ,  A01N47/24 ,  A01N47/30 ,  A01P3/00 ,  C07D20060101 ,  C07D231/08 ,  C07D231/20 ,  C07D231/22 ,  C07D231/30 ,  C07D401/04 ,  C07D403/04 ,  A01N43/56 ,  C07C239/10 ,  C07C271/28 ,  C07C271/58

CPC classification number: C07D401/04 ,  A01N47/24 ,  A01N47/30 ,  C07D231/08 ,  C07D231/20 ,  C07D231/22 ,  C07D403/04

公开(公告)号：CZ320596A3

公开(公告)日：1997-06-11

申请号：CZ320596

申请日：1995-04-25

Applicant: BASF AG

Inventor： OBERDORF KLAUS DR ,  KONIG HARTMANN DR ,  MULLER BERND DR ,  KIRSTGEN REINHARD DR ,  GRAMMENOS WASSILIOS DR ,  SAUTER HUBERT DR ,  LORENZ GISELA DR ,  AMMERMANN EBERHARD DR ,  HARRIES VOLKER DR

IPC: C07D231/06 ,  A01N43/56 ,  C07D231/08 ,  C07D231/20 ,  C07D401/04 ,  C07D403/04

Abstract: PCT No. PCT/EP95/01554 Sec. 371 Date Oct. 31, 1996 Sec. 102(e) Date Oct. 31, 1996 PCT Filed Apr. 25, 1995 PCT Pub. No. WO95/29896 PCT Pub. Date Nov. 9, 1995Methyl alpha -phenylbutenoates of the formula I I where +E,uns --+EE is a single or double bond and the index and the substituents have the following meanings: n is 0, 1, 2, 3 or 4; R1 is nitro, cyano, halogen, alkyl, haloalkyl or alkoxy; R2 is hydrogen, nitro, cyano, halogen, alkyl, haloalkyl, alkoxy, alkylthio or alkoxycarbonyl; R3 is unsubst. or subst. alkyl, alkenyl or alkynyl; an unsubst. or subst. saturated or mono-or diunsaturated ring which, in addition to carbon atoms, can contain one to three of the following heteroatoms as ring members: oxygen, sulfur and nitrogen, or an unsubst. or subst. mono- or binuclear aromatic radical which, in addition to carbon atoms, can contain one to four nitrogen atoms or one or two nitrogen atoms and an oxygen or sulfur atom or an oxygen or sulfur atom as ring members, processes for their preparation and their use are described.