the previously known hydroxy-aldehyde 14 (AB rings) from R -(−)-carvone, followed by an intramolecular Diels–Alder reaction between an oxygenated diene moiety and an acetylenic dienophile for the construction of the C ring (compound 22 ), and adequate manipulation of the Diels–Alder adduct functionality for completion of the spongiane framework.
摘要 描述了海绵状二萜家族的代表成员dorisenone C的合成。该合成遵循 B→AB→ABC→ABCD 方法,并且基于从 R -(-)-
香芹酮初步制备先前已知的羟基醛 14(AB 环),然后是分子内 Diels-Alder 反应。含氧二烯部分和炔属亲二烯体用于构建 C 环(化合物 22),并充分操纵 Diels-Alder 加合物功能以完成海绵骨架。