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Ring-rearrangement metathesis of nitroso Diels-Alder cycloadducts

机译:亚硝基Diels-Alder环加合物的环重整易位

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摘要

Strained nitroso Diels-Alder bicyclo[2.2.1] or [2.2.2] adducts functionalized with alkene side chains of diverse length undergo a ring-rearrangement metathesis process with external alkenes and Grubbs II or Hoveyda-Grubbs II ruthenium catalysts, under microwave irradiation or classical heating, to deliver cis-fused bicycles of various ring sizes, which contain a N-O bond. These scaffolds are of synthetic relevance for the generation of molecular diversity and to the total synthesis of alkaloids. The observation of unexpected reactions, such as epimerization or one-carbon homologation of the alkene side chain, is also reported.
机译:在微波辐射下,用不同长度的烯烃侧链官能化的亚硝基Diels-Alder双环[2.2.1]或[2.2.2]加合物与外部烯烃和Grubbs II或Hoveyda-Grubbs II钌催化剂在微波辐射下进行环重整复分解过程或传统的加热方式,以交付各种具有NO键的环尺寸的顺式自行车。这些支架与分子多样性的产生和生物碱的总合成具有合成相关性。还报道了观察到意想不到的反应,例如烯烃侧链的差向异构或一碳同系物。

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