Proline-Catalyzed Knoevenagel Condensation/[4+2] Cycloaddition Cascade Reaction: Application to Formal Synthesis of Averufin
作者:Haibo Tan、Xinzheng Chen、Huiyu Chen、Hongxin Liu、Shengxiang Qiu
DOI:10.1002/ejoc.201500559
日期:2015.8
A remarkable proline-catalyzed method for the construction of biologically interesting oxygen-bridged tricyclic ketal skeletons was uncovered by starting from a variety of readily available cyclic 1,3-diketones and either 1,4- or 1,5-dicarbonyl substrates. The approach, which mimics a biosynthetic Knoevenagel condensation/[4+2] cycloaddition sequence, establishes a viable synthetic strategy for the
通过从各种现成的环状 1,3-二酮和 1,4-或 1,5-二羰基底物开始,揭示了一种用于构建具有生物学意义的氧桥连三环缩酮骨架的非凡脯氨酸催化方法。该方法模拟了生物合成的 Knoevenagel 缩合/[4+2] 环加成序列,为阿鲁芬的有效形式合成建立了可行的合成策略。