Bi(III)-Catalyzed Synthesis of Substituted Furans from Hydroxy-oxetanyl Ketones: Application to Unified Total Synthesis of Shikonofurans J, D, E, and C
作者:Priyanka Kataria、Shubhranshu Shekhar Sahoo、Ravindar Kontham
DOI:10.1021/acs.joc.3c00549
日期:2023.6.2
Further, it demonstrated the utility of this method in the first enantioselective total synthesis of furyl-hydroquinone-derived biologically potent natural products shikonofurans J, D, E, and C in seven linear steps, starting from readily available building blocks of 2,5-dihydroxy acetophenone and 3-oxetanone employing chiral-phosphoric acid (TRIP)-catalyzed asymmetric prenylation as a key step to induce
我们报告了一种改进的羟甲基衍生多取代呋喃合成方案,该方案采用双(III)催化的α-羟基氧杂环丁基酮的脱水环异构化。此过程可快速(在 5 分钟内)获得高度取代的呋喃,具有出色的官能团多样性、出色的产量、通用性、可扩展性和操作简单的反应条件。此外,它证明了该方法在第一次对映选择性全合成呋喃基-对苯二酚衍生的具有生物活性的天然产物紫草呋喃 J、D、E 和 C 中的七个线性步骤中的实用性,从现成的 2,5- 构建块开始二羟基苯乙酮和 3-氧杂环丁酮采用手性磷酸 (TRIP) 催化的不对称异戊二烯化作为诱导手性的关键步骤。