Triterpenoid total synthesis. Part 4.1 Synthesis of (±)-hippospongic acid A, a triterpene isolated from the marine sponge Hippospongia sp.

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Hirosato Takikawa, Junko Koizumi, Yuko Kato and Kenji Mori


Abstract

Hippospongic acid A (1), a triterpene metabolite of a marine sponge Hippospongia sp. with inhibitory activity against gastrulation of starfish embryos, was synthesized as its racemate by starting from (2E,6E[hair space])-farnesol (2).


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