I wanted to carry out some experiments on the following molecule:

enter image description here

Unfortunately this molecule (santalene; either isomer will do) seems neither commercially available nor easily synthesizable.

Hence I am looking for analogs that I can start out with. Any idea which commercially available molecules might be similar to this molecule?

I did fine one analog (curcumene) but even that does not seem to be available with Sigma or any of the usual sources for even fairly esoteric molecules.

enter image description here

Any thoughts / tips? Alternatively, a synthesis for my target molecule might also help, in case I am missing any obvious routes.

PS. Any recommendations for tools / sites that will do a good search for analog molecules?

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    $\begingroup$ There's an old Corey paper on the synthesis of santalene DOI $\endgroup$ Jul 12, 2016 at 11:29
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    $\begingroup$ Santalene is the primary constituent of sandalwood oil, which is commercially available. You could isolate pure material by fractional distillation of the oil. sigmaaldrich.com/catalog/product/aldrich/… $\endgroup$
    – Curt F.
    Jul 12, 2016 at 14:38
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    $\begingroup$ @CurtF. Thanks. But to the best of my knowledge it is the Santalols which are the major constituents of the oil. Santalenes are 1-2% max. Separating enough from the oil seems difficult. But I could try that. $\endgroup$ Jul 12, 2016 at 17:56
  • $\begingroup$ Good point @curious_cat. You are right. This info might be helpful: ncbi.nlm.nih.gov/pubmed/22900258 $\endgroup$
    – Curt F.
    Jul 12, 2016 at 20:40
  • $\begingroup$ Additionally, I found very old references in the literature that dehydration of $\alpha$-santolol leads (unfortunately) to "$\alpha$-iso-santalene" and similarly for the $\beta$ isomer. I'm not 100% sure what the structure of "iso-santalene" is but presumably it is not what you are interested in? $\endgroup$
    – Curt F.
    Jul 12, 2016 at 20:41


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