Global Patent Index - EP 1187801 A4

EP 1187801 A4 2002-09-18 - A METHOD OF PREPARING CYCLOHEXANECARABOXYLIC ACID USING [2+4] DIELS-ALDER REACTION

Title (en)

A METHOD OF PREPARING CYCLOHEXANECARABOXYLIC ACID USING [2+4] DIELS-ALDER REACTION

Title (de)

VERFAHREN ZUR HERSTELLUNG VON CYCLOHEXANCARBONSÄURE MIT HILFE DER [2+4]-DIELS-ALDER-REAKTION

Title (fr)

PROCEDE DE PREPARATION D'ACIDE CYCLOHEXANECARBOXYLIQUE FAISANT APPEL A UNE REACTION [2+4] DIELS-ALDER

Publication

EP 1187801 A4 (EN)

Application

EP 99957434 A

Priority

  • KR 9900739 W
  • KR 19990004025 A
  • KR 19990037508 A

Abstract (en)

[origin: WO0046174A1] Disclosed herein is a method of preparing cyclohexanecarboxylic acid in which 1,3-butadiene and acrylic acid are subjected to [2+4] Diels-Alder reaction to produce 3-cyclohexene-1-carboxylic acid which is then hydrogenated. The [2+4] Diels-Alder reaction is carried out at a temperature of room temperature to 200 DEG C in an aromatic hydrocarbon solvent, such as toluene or xylene. The hydrogenation is carried out at a temperature of room temperature to 150 DEG C under a hydrogen pressure of 10 psi to 150 psi in the presence of the platinum of palladium catalyst. The disclosed method is featured in that it enables the use of 1,3-butadiene as the raw material for fine chemicals, unlike the prior methods. Moreover, the method disclosed is advantageous in that the reaction can be carried out in a relatively simple and easy manner and also the reaction by-products can be conveniently treated after the reaction.

IPC 1-7 (main, further and additional classification)

C07C 61/08

IPC 8 full level (invention and additional information)

C07C 51/00 (2006.01); C07B 61/00 (2006.01); C07C 51/353 (2006.01); C07C 51/36 (2006.01); C07C 61/08 (2006.01)

CPC (invention and additional information)

C07C 51/353 (2013.01); C07C 51/36 (2013.01)

Combination set (CPC)

  1. C07C 51/353 + C07C 61/22
  2. C07C 51/36 + C07C 61/08

Citation (search report)

  • No further relevant documents disclosed
  • See also references of WO 0046174A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0046174 A1 20000810; AU 1513800 A 20000825; BR 9917235 A 20011127; CA 2361682 A1 20000810; CN 1348437 A 20020508; EP 1187801 A1 20020320; EP 1187801 A4 20020918; HU 0200112 A2 20020529; HU 0200112 A3 20030228; JP 2002539083 A 20021119; KR 20000056975 A 20000915; PL 350029 A1 20021021

INPADOC legal status


2007-11-14 [RTI1] TITLE (CORRECTION)

- Free text: A METHOD OF PREPARING CYCLOHEXANECARABOXYLIC ACID USING ??2+4 DIELS-ALDER REACTION

2003-05-02 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20021022

2002-09-18 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20020801

2002-09-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2002-03-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010718

2002-03-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE