[EN] PROCESS FOR THE ISOMERISATION OF A CYCLOHEXENYL ALKYL OR ALKENYL KETONE<br/>[FR] PROCEDE D'ISOMERISATION D'UN ALKYLE CYCLOHEXENYLIQUE OU D'UNE CETONE ALCENYLIQUE
申请人:FIRMENICH & CIE
公开号:WO2005061426A1
公开(公告)日:2005-07-07
The present invention relates to a process for the carbon-carbon double bond isomerisation of a 2-alkyl-cyclohex-3-enyl alkyl or alkenyl ketone into a mixture comprising the corresponding 2-alkyl-cyclohex-2-enyl ketones and the corresponding 2-alkylene-cyclohexyl ketones, using as catalyst a ruthenium complex obtainable by the reaction of an appropriate ruthenium organometallic precursor and an acid.
The invention relates to a catalytic system for use in a process for the preparation, in a single step, of enones by an aldol condensation of a ketone, such as a gem-dimethyl cyclohexylethanone or gem-dimethyl cyclohexenylethanone derivative, with an aldehyde in the presence of a novel catalytic system and a co-ingredient, such as a carboxylic acid anhydride or an anhydrous salt, and without the pre-formation of an enolate. The catalytic system is a metal complex, such as a [(Cl)
n
(alkoxy)
4-n
Ti] or [(Cl)
n
(alkoxy)
4-n
Zr] complex where n is 1 to 3.
Process for the isomerisation of a cyclohexenyl alkyl or alkenyl ketone
申请人:Jacoby Denis
公开号:US20060211889A1
公开(公告)日:2006-09-21
The present invention relates to a process for the carbon-carbon double bond isomerisation of a 2-alkyl-cyclohex-3-enyl alkyl or alkenyl ketone into a mixture comprising the corresponding 2-alkyl-cyclohex-2-enyl ketones and the corresponding 2-alkylene-cyclohexyl ketones, using as catalyst a ruthenium complex obtainable by the reaction of an appropriate ruthenium organometallic precursor and an acid.