carbene (NHC) catalyzed intramolecular lactonization to prepare densely functionalized bicyclic γ-lactam-γ-lactone adducts from enals is reported. This method has been applied to the formal synthesis of salinosporamide A, a potent 20S proteasome inhibitor and anti-cancer therapeutic.
报道了N-杂环卡宾 (NHC) 催化分子内内酯化以从 enals 制备密集功能化的双环 γ-内酰胺-γ-内酯加合物。该方法已应用于盐孢菌素 A 的正式合成,这是一种有效的 20S
蛋白酶体
抑制剂和抗癌治疗剂。