Global Patent Index - EP 1097133 A1

EP 1097133 A1 2001-05-09 - METHOD FOR PREPARING VITAMIN A

Title (en)

METHOD FOR PREPARING VITAMIN A

Title (de)

VERFAHREN ZUR HERSTELLUNG VON VITAMIN A

Title (fr)

PROCEDE DE PREPARATION DE LA VITAMINE A

Publication

EP 1097133 A1 (FR)

Application

EP 99929420 A

Priority

  • FR 9901635 W
  • FR 9808873 A

Abstract (en)

[origin: FR2780970A1] The invention concerns a novel method for preparing vitamin A from ethynyl-retro- alpha -ionol using an allene acetate as intermediate.

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

C07C 403/14; C07C 403/12; C07C 403/08; C07C 403/16

IPC 8 full level (invention and additional information)

C07B 61/00 (2006.01); C07C 47/11 (2006.01); C07C 67/00 (2006.01); C07C 403/08 (2006.01); C07C 403/12 (2006.01); C07C 403/14 (2006.01); C07C 403/16 (2006.01); C07C 403/20 (2006.01)

CPC (invention and additional information)

C07C 403/14 (2013.01); C07C 403/08 (2013.01); C07C 403/12 (2013.01); C07C 2601/16 (2017.05)

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

FR 2780970 A1 20000114; FR 2780970 B1 20000818; AU 4624399 A 20000201; CN 1313851 A 20010919; EA 003364 B1 20030424; EA 200100131 A1 20010625; EP 1097133 A1 20010509; JP 2002520312 A 20020709; US 6384270 B1 20020507; WO 0002854 A1 20000120

INPADOC legal status


2003-06-04 [18W] WITHDRAWN

- Effective date: 20030331

2002-10-23 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020910

2001-05-09 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001208

2001-05-09 [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

2001-05-09 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL PAYMENT 20001208;LT PAYMENT 20001208;LV PAYMENT 20001208;MK PAYMENT 20001208;RO PAYMENT 20001208;SI PAYMENT 20001208