| 54 |
Titel |
TI |
[DE] Verfahren zur Herstellung von Cyclopropylmethylketon.
[EN] Process for the production of cyclopropylmethylketone.
[FR] Procédé pour la préparation de cyclopropylméthylkétone. |
| 71/73 |
Anmelder/Inhaber |
PA |
CIBA GEIGY AG, CH
|
| 72 |
Erfinder |
IN |
HUNSTON ROGER DR, CH
;
WADITSCHATKA RUDOLF DR, CH
|
| 22/96 |
Anmeldedatum |
AD |
10.11.1992 |
| 21 |
Anmeldenummer |
AN |
92810872 |
|
Anmeldeland |
AC |
EP |
|
Veröffentlichungsdatum |
PUB |
28.07.1993 |
33
31
32 |
Priorität |
PRC
PRN
PRD |
US
79453691
19911119
|
| 51 |
IPC-Hauptklasse |
ICM |
C07C 45/67
|
| 51 |
IPC-Nebenklasse |
ICS |
C07C 49/293
|
|
IPC-Zusatzklasse |
ICA |
|
|
IPC-Indexklasse |
ICI |
|
|
Gemeinsame Patentklassifikation |
CPC |
C07C 41/22
C07C 45/676
|
|
MCD-Hauptklasse |
MCM |
C07C 45/59
(2006.01)
|
|
MCD-Nebenklasse |
MCS |
C07C 45/67
(2006.01)
C07C 49/293
(2006.01)
|
|
MCD-Zusatzklasse |
MCA |
|
| 57 |
Zusammenfassung |
AB |
[EN] A process is described for the production of the known intermediate cyclopropylmethyl-ketone which delivers a high yield, few side products, high reaction efficiency and turnover, and is more viable practically and commercially. In the presence of an excess of a Periodic Table Group I or Group II metal halide or quaternary phosphonium halide, alpha -acetyl- gamma -butyrolactone is led continuously into a reaction vessel at 170-200 DEG C and cyclopropylmethylketone distilled off continuously. The halide is recovered and recycled in the process. |
| 56 |
Entgegengehaltene Patentdokumente/Zitate,
in Recherche ermittelt |
CT |
|
| 56 |
Entgegengehaltene Patentdokumente/Zitate,
vom Anmelder genannt |
CT |
|
| 56 |
Entgegengehaltene Nichtpatentliteratur/Zitate,
in Recherche ermittelt |
CTNP |
CHEMICAL ABSTRACTS, vol. 84 Columbus, Ohio, US; abstract no. 105042, TAKEI S ET AL. 'Novel synthesis of cyclopropyl ketones by decarboxylative ring contractions of .alpha.-acyl-.gamma.-butyrolactones catalyzed by halide ions in dipolar aprotic solvents' 0;
CHEMICAL ABSTRACTS, vol. 84 Columbus, Ohio, US; abstract no. 16711, ASAOKA M ET AL. 'Alkylation reaction accompanied by dealkoxycarbonylation of .beta.-keto esters, geminal diesters, and .alpha.-cyano ester in hexamethylphosphoric triamide (HMPA)' 0;
CHEMICAL ABSTRACTS, vol. 86, Columbus, Ohio, US; abstract no. 55055, TAKEI S ET AL: "Acylcyclopropanes" 0
|
| 56 |
Entgegengehaltene Nichtpatentliteratur/Zitate,
vom Anmelder genannt |
CTNP |
|
|
Zitierende Dokumente |
|
Dokumente ermitteln
|
|
Sequenzprotokoll |
|
|
|
Prüfstoff-IPC |
ICP |
C07C 49/293
|
