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。