PROCESS FOR THE PREPARATION OF METHYLALUMINIUM DICHLORIDE
申请人:Givaudan SA
公开号:EP1656384B1
公开(公告)日:2009-10-14
PROCESS FOR THE PREPARATION OF CIS-2-ACETYL-1,2,3,4,5,6,7,8-OCTAHYDRO-1,2,8,8-TETRAMETHYLNAPHTHALENE
申请人:Givaudan SA
公开号:EP1853542A1
公开(公告)日:2007-11-14
PROCESS FOR THE CYCLOPROPANATION OF OLEFINS USING N-ALKYL-N-NITROSO COMPOUNDS
申请人:Givaudan S.A.
公开号:EP3060535B1
公开(公告)日:2020-08-05
Cyclisation Process
申请人:Schroder Fridtjof
公开号:US20080114189A1
公开(公告)日:2008-05-15
A process of preparation of cis-2-acetyl-1,2,3,4,5,6,7,8-octahydro-1,2,8,8-tetramethylnaphthalene (“β-Georgywood”) from cis-1-[1,2-dimethyl-4(4-methyl-pent-3-enyl)-cyclohex-3-enyl]-ethanone (“Ψ-Georgywood”), comprising the reaction of Ψ-Georgywood with more than one molar equivalent of a Lewis acid. The method allows the preparation of isomeric mixtures that contain a much higher proportion of the olfactorily-desirable β-Georgywood than was previously possible.
IMPROVEMENTS IN OR RELATING TO ORGANIC COMPOUNDS
申请人:GIVAUDAN S.A.
公开号:US20160280615A1
公开(公告)日:2016-09-29
A process of converting a carbon-carbon multiple bond to a cyclopropane ring, comprising the addition of a N-alkyl-N-nitroso compound to a mixture of alkene precursor, aqueous base and Pd(II)-catalyst, with the N-alkyl-N-nitroso compound obtained directly from an alkyl amine derivative, NaNO
2
and an acid via phase separation of the N-alkyl-N-nitroso compound from the aqueous phase.