申请人:COLLEGE OF WILLIAM AND MARY
公开号:US20130296564A1
公开(公告)日:2013-11-07
Herein we describe compositions and methods for the synthesis of [2.2.2]-diazabicyclic structures comprising a domino reaction sequence involving aldol condensation, alkene isomerization, and intramolecular hetero-Diels-Alder cycloaddition. Excellent diastereofacial control during the cycloaddition is enforced with a removable chiral phenyl aminal diketopiperazine substituent. The reaction sequence rapidly generates molecular complexity and is competent with both enolizable and non-enolizable aldehyde substrates. This method provides an efficient route to [2.2.2]-diazabicyclic structures, common to bioactive prenylated indole alkaloids such as the brevianamides and stephacidins.
在这里,我们描述了一种合成[2.2.2]-二氮杂双环结构的组合物和方法,包括一个多米诺反应序列,涉及醛缩合、烯烃异构化和分子内杂Diels-Alder环加成。在环加成过程中,采用可移除的手性苯基胺基二酮肽取代基强制实现了优异的对映面控制。该反应序列快速生成分子复杂性,并适用于既可烯化又不可烯化的醛基底物。这种方法提供了一种有效的合成途径,用于制备[2.2.2]-二氮杂双环结构,这些结构常见于生物活性的类似于百里酰胺和司法酸的前尼双环吲哚生物碱。