A novel approach towards the construction of the galanthamine skeleton was demonstrated by the total synthesis of (±)-lycoramine. The key steps include a Pd-catalyzed intramolecular cyclization to form the seven-membered azepane ring and a spontaneous intramolecular Michael addition to afford the five-membered furan ring. This synthetic route has also been demonstrated to be useful for the preparation
(±)-lycoramine的全合成证明了一种构造
加兰他敏骨架的新颖方法。关键步骤包括
钯催化的分子内环化反应以形成七元氮杂
环戊烷环和自发的分子内迈克尔加成反应以提供五元
呋喃环。该合成途径也已被证明可用于制备具有简化的
加兰他敏骨架的新型衍
生物。