Abstract

Solamargine, (25R)-3β-{O-α-l-rhamnopyranosyl-(1→2)-[O-α-l-rhamnopyranosyl-(1→4)]-β-d-glucopyranosyloxy}-22α-N-spirosol-5-ene, isolated from the berries of solanum aculeastrum, has been synthesized in 26.8% overall yield. First glycosylation before N-cyclization significantly facilitated synthesis of the desired molecule. We anticipate that this work will provide a new approach to access solamargine and its diversified analogues.

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