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US 4,045,476 AGranted
1-(2,6,6-Trimethyl-3-hydroxy or lower alkanoyloxycyclohexen-1-yl)-3-methyl-4-penten-1-yn-3-ol compound
AssigneeHoffmann-La Roche Inc.
InventorMichael Rosenberger
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Abstract
A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.
Claims2
A compound of the formula:
- ##STR25## wherein R.sub.11 is hydrogen or lower alkanoyl.
Dependencies are inferred from the claim text.