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The first total syntheses of amarouciaxanthin A and B (C40) via the stereoselective Wittig reaction of C15-allenic and C15-acetylenic tri-n-butylphosphonium salts with the unprecedented C25-3,8-dihydroxy-5,6-epoxyapocarotenal have been completed. Oxidation of the two hydroxyl groups in the left part of the resulting condensation products followed by regioselective oxirane ring opening gave the target carotenoids.


Yumiko Yamano, Mahankhali Venu Chary, Akimori Wada. Stereocontrolled first total syntheses of amarouciaxanthin A and B. Organic letters. 2013 Oct 18;15(20):5310-3

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PMID: 24090226

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