Utilization of the Thorpe–Ingold Effect in the Synthesis of Cyclooctanoid Ring Systems via Anionic 6-<i>exo</i>-<i>dig</i> Cyclization/Claisen Rearrangement Sequence
作者:Weston C. DeLomba、Elizabeth A. Stone、Kimberly A. Alley、Victoria Iannarone、Emily Tarsis、Sami Ovaska、Timo V. Ovaska
DOI:10.1021/acs.joc.0c01132
日期:2020.8.7
demonstrate a facile approach for the synthesis of gem-disubstituted cyclooctanoids, a motif found in several biologically active compounds. Appropriately substituted 1-alkenyl-5-pentyn-1-ols bearing gem-dialkyl substituents at either the C2, C3, or C4 position serve as useful precursors to a number of cyclooct-4-enone derivatives via a tandem, microwave-assisted oxyanionic 6-exo-dig cyclization/Claisen
我们展示了一种合成宝石二取代环辛烷类化合物的简便方法,这是一种在几种生物活性化合物中发现的基序。适当取代的1-烯-5-戊炔-1-醇轴承宝石二烷基取代基在任一C2,C3,C4或位置作为经由串联有用的前体的数环辛-4-烯酮衍生物的,微波辅助含氧阴离子6- exo - dig环化/克莱森重排反应。宝石二烷基激活是必要的发生这些反应中,作为未活化的1-烯-5-戊炔-1-醇不能经历6-外型-挖在所采用的条件下进行环化。该方法以相应的进一步应用宝石-dialkoxy系统还探讨促进获得更复杂的碳环。