EP 0722432 A1 19960724 - METHOD FOR PREPARING OF MONO OR DI-2-SUBSTITUTED CYCLOPENTANONE
Title (en)
METHOD FOR PREPARING OF MONO OR DI-2-SUBSTITUTED CYCLOPENTANONE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON 2-MONO-ODER DISUBSTITUIERTEN CYCLOPENTANON
Title (fr)
PROCEDE DE PREPARATION DE CYCLOPENTANONE MONO- OU DI-SUBSTITUEE EN POSITION 2
Publication
Application
Priority
- FR 9401157 W 19941004
- FR 9312153 A 19931007
Abstract (en)
[origin: WO9509830A1] Method for the preparation of mono or di_2-substituted cyclopentanone characterized in that it consists in performing in sequence four stages (a) to (d) which can be successively carried out, if desired, in the same reactor: (a) addition of alkyl acetoacetate to 1,3-butadiene, optionally 2-substituted; (b) the addition product formed is subjected to deacylation, following by an alkaline hydrolysis reaction and acidification to produce a carboxylic monacid having 6 carbon atoms in its main chain; (c) said monacid is subjected to hydroxycarbonylation to produce an alpha , omega -carboxylic diacid having 6 carbon atoms in its mains chain; and (d) said diacid is subjected to cyclizing decarboxylation. The invention is especially intended for the preparation of 2,2-dimethylcyclopentanone.
IPC 1-7
C07C 45/48; C07C 49/395; C07C 67/347; C07C 69/738; C07C 51/09; C07C 57/03; C07C 51/14; C07C 55/02
IPC 8 full level
B01J 31/24 (2006.01); C07B 61/00 (2006.01); C07C 45/48 (2006.01); C07C 45/54 (2006.01); C07C 49/395 (2006.01); C07C 49/517 (2006.01); C07C 49/657 (2006.01); C07C 49/753 (2006.01); C07C 51/09 (2006.01); C07C 51/10 (2006.01); C07C 51/12 (2006.01); C07C 53/126 (2006.01); C07C 55/00 (2006.01); C07C 67/317 (2006.01); C07C 67/32 (2006.01); C07C 67/347 (2006.01); C07C 69/533 (2006.01); C07C 69/593 (2006.01); C07C 69/738 (2006.01)
CPC (source: EP KR)
C07C 45/48 (2013.01 - EP KR); C07C 51/12 (2013.01 - EP)
Citation (search report)
See references of WO 9509830A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9509830 A1 19950413; AU 675367 B2 19970130; AU 7995894 A 19950501; BR 9407734 A 19970212; CA 2173618 A1 19950413; CN 1132503 A 19961002; CZ 100796 A3 19960717; EP 0722432 A1 19960724; FI 961553 A0 19960409; FI 961553 A 19960409; FR 2710908 A1 19950414; FR 2710908 B1 19951117; HU 9600905 D0 19960528; HU T74481 A 19970128; IL 111166 A0 19941229; JP H09503219 A 19970331; KR 960704829 A 19961009; ZA 947879 B 19950522
DOCDB simple family (application)
FR 9401157 W 19941004; AU 7995894 A 19941004; BR 9407734 A 19941004; CA 2173618 A 19941004; CN 94193694 A 19941004; CZ 100796 A 19941004; EP 94931058 A 19941004; FI 961553 A 19960409; FR 9312153 A 19931007; HU 9600905 A 19941004; IL 11116694 A 19941004; JP 51064595 A 19941004; KR 19960701794 A 19960404; ZA 947879 A 19941007