Hyperireflexolides A and B were synthesized in six steps via the dearomatization and fragmentation of a simple acylphloroglucinol starting material. The dearomatized acylphloroglucinol undergoes a sequence of oxidative radical cyclization, retro-Dieckmann fragmentation, stereodivergent intramolecular carbonyl-ene reactions, and final α-hydroxy-β-diketone rearrangements to give the target natural products
Hyperireflexolides A 和 B 通过简单的酰基
间苯三酚起始材料的
脱芳构化和断裂分六个步骤合成。
脱芳构酰基
间苯三酚经历一系列
氧化自由基环化、逆迪克曼断裂、立体发散分子内羰基
烯反应以及最终的α-羟基-
β-二酮重排,得到目标
天然产物。该序列基于一项
生物合成提议,该提议声称 hyperireflexolides 是高度重排的多环聚
异戊二烯酰基
间苯三酚 (
PPAP),该提议得到了 hyperireflexolides B 结构修改的支持。