Ketyl Radical Cyclization of β-Disubstituted Acrylates: Formal Syntheses of (+)-Secosyrin 1 and Longianone and the Total Synthesis of (+)-4-<i>epi</i>-Secosyrin 1
作者:Christopher D. Donner
DOI:10.1021/ol4001894
日期:2013.3.15
approach to the synthesis of a series of 1,7-dioxaspirononanes that applies a ketyl radical cyclization strategy is described. Radical cyclization of the β-disubstituted acrylate 23, prepared in five steps from (R)-1,2-isopropylideneglycerol, gives both 2,3-syn- and 2,3-anti-furan products. The densely functionalized furan heterocycles are used to complete a concise formal synthesis of secosyrin 1, a metabolite
描述了一种新的合成方法,该方法合成了一系列应用酮基环化策略的1,7-二氧杂萘二酮。由(R)-1,2-异亚丙基甘油分五个步骤制备的β-二取代丙烯酸酯23的自由基环化,得到2,3-顺-和2,3-抗呋喃产物。密集功能化的呋喃杂环可用于完成简明的正式合成,即粘胶蛋白1(丁香假单胞菌的代谢产物)和4- Epi- secosyrin 1的总合成。