Process for preparing unsaturated spiranic derivatives
申请人:Firmenich SA
公开号:US04176139A1
公开(公告)日:1979-11-27
Process for preparing unsaturated spiranic derivatives of formula ##STR1## wherein index n represents integer 1 or 2 and wherein symbol R defines a lower alkyl radical, starting from the corresponding cycloalkanone via an addition thereto of a dihalo-alkene of formula ##STR2## wherein symbol R possesses the above-indicated meaning and X represents a halogen atom.
[EN] PROCESS FOR PREPARING PERFUMING INTERMEDIATE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN INTERMÉDIAIRE PARFUMANT
申请人:FIRMENICH & CIE
公开号:WO2021176009A1
公开(公告)日:2021-09-10
The present invention relates to the field of organic synthesis and more specifically it concerns a process for preparing compound of formula (I) by a cross metathesis reaction. Said compound of formula (I) is valuable new chemical intermediate for producing perfuming ingredients and is also part of the present invention.