A stereoselective synthesis of natural (+)-caparratriene was developed starting from commercially available L-menthol and tiglic aldehyde. The key step was a Wittig reaction of the latter with the triphenylphosphorane generated from (R)-(–)-citronellyl bromide. (+)-Caparratriene as a mixture (4:1) of 2E,4E- and 2E,4Z-stereoisomers is a known anticancer agent.
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Translated from Khimiya Prirodnykh Soedinenii, No. 3, May–June, 2018, pp. 391–393.
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Vydrina, V.A., Kravchenko, A.A., Yakovleva, M.P. et al. Stereoselective Synthesis of the Antileukemic Sesquiterpene (+)-Caparratriene from L-menthol and Tiglic Aldehyde. Chem Nat Compd 54, 461–463 (2018). https://doi.org/10.1007/s10600-018-2379-y
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DOI: https://doi.org/10.1007/s10600-018-2379-y