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US 4,071,542 AGranted
Synthesis of hydroxycyclopenten-1-ones
AssigneeHoffmann-La Roche Inc.
InventorGeorge Buchi
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Abstract
This invention relates to a process for the preparation of 2-alkenyl-4-hydroxy-3-methyl-2-cyclopenten-1-ones from the reaction product of 2,4-pentane dione and a 2-propen- or 2-propyn-1-ol derivative including intermediates therein.
Claims2
The compound of the formula:
- ##STR4## wherein R is hydrogen, lower alkyl or lower alkenyl;
- X is chloro;
- and the dotted bond can be optionally hydrogenated.
Dependencies are inferred from the claim text.