[AlphaScent]

So I am trying to figure out the best way to synthesize Isopiperitenone.  The enone analog of the product attached.
I think allylic oxidation of d-limonene will give poor yields and mixtures of products.  Mostly carvone.

Though direct allylic oxidation may end up being my only option, I can across a reference from a paper about the synthesis of isopiperitenol from citral.  I cannot get access to this reference.  It states that you can make isopiperitenol from citral in one step.  I am trying to think about what that one step could be since I cannot find the journal. 

I am not asking for anyone to give me copyrighted material.  Please do not send me it if you find the reference.

Verley A. Bull. Soc. Chim. Fr. 1899; 21; 408

I think the mechanism could be acid catalyzed?? The acid attached to the oxygen. Giving a negative charge on the carbonyl carbon that can attack the tetrasubstituted double bond...I think I am wrong

Any help is greatly appreciated

[discodermolide]

Could this be an intra-molecular Prins reaction?

[AlphaScent]

I was wrong.  Meant a POSITIVE charge on the carbonyl carbon.  After a quick google search it seems to me that it is indeed an allyic alcohol product Prins reaction.

It seems to me that you mad also get the diol, but you would be able to separate those two quite easily.

Have to do some literature research on this reaction.

Thanks Disco!!!