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(−)-Petrosiol E, a metabolite of sponge Petrosia strongylata, has been synthesized in 32% overall yield from cheap natural d-xylose in 10 steps. Our strategy provides an efficient way for the total synthesis of other petrosiol members, featuring the three contiguous stereogenic centers are easily constructed from d-xylose chiral template.
From an extract of the Okinawan sponge Petrosia strongylata, five novel acetylenic metabolites, petrosiols A (1)–E (5), were isolated and chemically characterized. These compounds induced nerve growth factor (NGF)-like neuronal differentiation of PC12 cells. The structure–activity relationships of the petrosiols, their derivatives, and some related known compounds suggest the importance of the rare...
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