SmI2-Promoted novel tandem elimination and coupling reactions of aliphatic imides with carbonyl compounds: application to the synthesis of dl-isoretronecanol
作者:Masayuki Kabata、Takamasa Suzuki、Kunihiko Takabe、Hidemi Yoda
DOI:10.1016/j.tetlet.2005.12.126
日期:2006.3
Treatment of α-hetero-substituted cyclic imides with carbonyl compounds mediated by samarium(II) diiodide in the presence of HMPA was found to undergo novel tandem elimination and reductive coupling reactions to generate α-hydroxyalkylated imides in good to high yields. Stereochemistry of the coupling products was researched and the result that increasing the steric bulkiness of the N-substituents
发现在HMPA存在下,用二碘化sa(II)介导的羰基化合物处理α-杂环取代的环状酰亚胺会进行新型的串联消除和还原偶联反应,从而以高至高收率生成α-羟烷基化的酰亚胺。研究了偶联产物的立体化学,并观察到增加N-取代基的立体体积导致苏式选择性增加的结果。还简要记录了这种立体选择性的机理起源,并将该反应进一步用于简单的吡咯并立烷生物碱异戊烯醇的合成。