Described is a concise total synthesis of (-)-ambiguine P, a cycloheptane-containing member of the hapalindole alkaloids. The challenging pentacyclic framework of the natural product was assembled rapidly via a [4 + 3] cycloaddition reaction-inspired strategy, and the tertiary hydroxy group was introduced by an NBS-mediated bromination-nucleophilic substitution sequence.
描述了 (-)-ambiguine P 的简明全合成,它是 hapalindole 生物碱的一种含环庚烷的成员。通过受[4 + 3]环加成反应启发的策略快速组装天然产物的具有挑战性的五环骨架,并通过NBS介导的溴化-亲核取代序列引入叔羟基。