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US 4,579,973 AGranted
Process for the manufacture of cyclohexene derivatives
AssigneeHoffman-La Roche Inc.
InventorsErich Widmer, Reinhard Zell
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Abstract
A novel process for the manufacture of cyclohexene derivatives which are suitable as intermediates for the manufacture of rhodoxanthin or zeaxanthin, as well as a process for the manufacture of rhodoxanthin or of zeaxanthin itself. The invention is also concerned with a novel starting material and novel intermediates in this process.
Claims14
A process for producing a cyclohexene derivative of the formula:
- ##STR11## comprising reducing a compound of the formula:
- ##STR12## by means of a reducing agent which is zinc to form said compound of formula II, said reduction being carried out in a strongly basic homogeneous organic solvent medium at a pH of from 13 to 14.
Dependencies are inferred from the claim text.