VERFAHREN ZUR HERSTELLUNG VON SYMMETRISCHEN UND UNSYMMETRISCHEN CARBONATEN
申请人:GÖDECKE GMBH
公开号:EP1154980B1
公开(公告)日:2004-05-26
[DE] VERFAHREN ZUR HERSTELLUNG VON SYMMETRISCHEN UND UNSYMMETRISCHEN CARBONATEN<br/>[EN] METHOD FOR PRODUCING SYMMETRICAL AND ASYMMETRICAL CARBONATES<br/>[FR] PROCEDE DE PREPARATION DE CARBONATES SYMETRIQUES ET ASYMETRIQUES
申请人:GOEDECKE AG
公开号:WO2000047544A1
公开(公告)日:2000-08-17
Verfahren zur Herstellung von symmetrischen und unsymmetrischen Carbonaten der allgemeinen Formel (I) durch Umsetzung von Alkoholen der allgemeinen Formel (II) und Alkyl- bzw. Arylhaliden der allgemeinen Formel (III), mit Kohlendioxid und Cesiumcarbonat bei Raumtemperatur in dipolar aprotischen Lösungsmitteln.
Method for producing symmetrical and asymmetrical carbonates
申请人:Goedecke GmbH
公开号:US06740768B1
公开(公告)日:2004-05-25
Process for the preparation of symmetrical and asymmetrical carbonates of the general formula I
by reaction of alcohols of the general formula II and alkyl or aryl halides of the general formula III,
R—OH II
R′—HAL III
with carbon dioxide and caesium carbonate at room temperature in dipolar aprotic solvents.
Atom-economic and stereoselective catalytic synthesis of fully substituted enol esters/carbonates of amides in acyclic systems enabled by boron Lewis acid catalysis
strategy for enol ester synthesis. However, the reported examples come with limitations, including the utilization of noble metal catalysts, the control of regio- and Z/E selectivity, and an application in the synthesis of enol carbonates. Herein, a boron Lewis acid-catalyzed intermolecular carboacyloxylation of ynamides with esters to access fully substituted acyclic enol esters in high yield with