US 4,000,198 AGranted

Hydroxy-acetylene-substituted cyclohexenone

AssigneeHoffmann-La Roche Inc.

InventorMichael Rosenberger

Life of this patent

Estimating the term…

A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.

Dependent claims

A compound of the formula:

Dependencies are inferred from the claim text.

C07C 403/24
Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four…:…
C07C 45/455
By condensation: with carboxylic acids or their derivatives
C07C 45/513
Involving transformation of singly bound oxygen functional groups to >C = O groups: the singly bound functional group being an etherified hydroxyl…
C07C 45/62
By reactions not involving the formation of >C = O groups: by hydrogenation of carbon-to-carbon double or triple bonds

No related US applications are recorded in the indexed filing history.

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