Bioinspired Total Synthesis of Bipolarolides A and B
Angewandte Chemie(2024)
摘要
We have achieved the first total synthesis of bipolarolides A and B, which possess an intriguing and complex 5/6/6/6/5 caged pentacyclic skeleton with seven contiguous stereocenters. The synthesis features a lithium-halogen exchange/intermolecular nucleophilic addition to link two enantioenriched fragments, two ring-closing metathesis reactions to assemble the five- and eight-membered rings, and a bioinspired Prins reaction/ether formation cascade cyclization to construct the 5/6/6/6/5 caged skeleton. The bioinspired total synthesis of bipolarolides A and B was achieved by using a lithium-halogen exchange/intermolecular nucleophilic addition to link two enantiomerically enriched fragments, two ring-closing metathesis reactions to assemble the five- and eight-membered rings, and a bioinspired Prins reaction/ether formation cascade cyclization to construct the 5/6/6/6/5 caged skeleton.+image
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关键词
Bioinspired Synthesis,Cascade Cyclization,Natural Products,Prins Reaction,Total Synthesis
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