An asymmetric synthesis of the paralytic shellfish poison (PSP), (+)-gonyautoxin 3, is described. A unique, Rh-catalyzed amination reaction provides rapid access to the heteratom-rich, tricyclic core of the toxin, which is common to more than 30 related natural products. The completed route should facilitate the preparation of other naturally occurring PSPs and designed analogues thereof.
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Mulcahy et al. (2008) studied this question.
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