Functionalized 3(2H)-furanones via photooxygenation of (β-keto)-2-substituted furans: Application to the biomimetic synthesis of merrekentrone C
作者:Charis Gryparis、Ioannis N. Lykakis、Christina Efe、Ioannis-Panayotis Zaravinos、Theonymphi Vidali、Eugenia Kladou、Manolis Stratakis
DOI:10.1039/c1ob05567d
日期:——
Photooxygenation of (β-keto)-2-substituted furans leads, in a one pot operation, to functionalized 3(2H)-furanones with good to excellent yields. This methodology was applied as a key-step to the concise and biomimetic synthesis of the sesquiterpene merrekentrone C. The precursor to merrekentrone C, keto difuran, was synthesized using a cross coupling of α-iodo-3-acetylfuran with an alkenyl furan under Fenton-type conditions.
(β-酮)-2-取代呋喃的光氧化反应在一步法操作中,以良好至优异的产率得到功能化的3(2H)-呋喃酮。这一方法被应用于短小且仿生的倍半萜烯merrekentrone C的合成中的关键步骤。merrekentrone C的前体,酮二呋喃,是通过在Fenton型条件下,α-碘代-3-乙酰基呋喃与烯基呋喃的交叉偶联反应来合成的。