EP 1097133 A1 20010509 - 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
Application
Priority
- FR 9901635 W 19990707
- FR 9808873 A 19980710
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
IPC 8 full level
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 (source: EP US)
C07C 403/08 (2013.01 - EP US); C07C 403/12 (2013.01 - EP US); C07C 403/14 (2013.01 - EP US); C07C 2601/16 (2017.04 - EP US)
Citation (search report)
See references of WO 0002854A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
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
DOCDB simple family (application)
FR 9808873 A 19980710; AU 4624399 A 19990707; CN 99810041 A 19990707; EA 200100131 A 19990707; EP 99929420 A 19990707; FR 9901635 W 19990707; JP 2000559085 A 19990707; US 74328901 A 20010420