Double-Tandem [4<sub>π</sub>+2<sub>π</sub>]·[2<sub>π</sub>+2<sub>π</sub>]·[4<sub>π</sub>+2<sub>π</sub>]·[2<sub>π</sub>+2<sub>π</sub>] Synthetic Sequence with Photoprotolytic Oxametathesis and Photoepoxidation in the Chromone Series
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Chromones are introduced into a double-tandem [4π+2π]·[2π+2π]·[4π+2π]·[2π+2π] synthetic sequence, culminating in photoprotolytic oxametathesis, which leads to an expeditious growth of molecular complexity over a few experimentally simple steps. The overall reaction can potentially be utilized in diversity-oriented synthesis, as it allows for three or more diversity inputs furnishing novel unique polycyclic scaffolds decorated with a variety of functionalities and aromatic/heterocyclic pendants. The polycyclic alkenes, resulting from the oxametathesis step, were found to undergo efficient and clean photoinduced epoxidation when irradiated in the presence of molecular oxygen.
创建时间：
2011-03-04
