Improved process for preparing astacene
AssigneeBASF SE
InventorsBernd SCHAEFER, Wolfgang SIEGEL
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Abstract
The invention describes a process for making astacene of formula 1, the exocyclic double bonds thereof having either an E configuration or an E- and/or Z-configuration, wherein astaxanthin of the general formula 2 having asymmetric centers 3 and 3′, each of which respectively having an (S)- or (R)-conformation and the exocyclic double bonds of said astaxanthin 2 having either an E- or E- and/or Z configuration, is oxidized in the presence of at least one tertiary alcoholate.
Claims19
-16. (canceled)
A process for making astacene of formula (1), the exocyclic double bonds thereof having either an E configuration or an E- and/or Z-configuration
- wherein astaxanthin of the general formula (2)
- having asymmetric centers 3 and 3′, each of which respectively having an (S)- or (R)-conformation and the exocyclic double bonds of said astaxanthin (2) having either an E- or E- and/or Z configuration,
- is oxidized in the presence of at least one tertiary alcoholate.
Dependencies are inferred from the claim text.