Five Roads That Converge at the Cyclic Peroxy-Criegee Intermediates: BF<sub>3</sub>-Catalyzed Synthesis of β-Hydroperoxy-β-peroxylactones
作者:Vera A. Vil’、Gabriel dos Passos Gomes、Maria V. Ekimova、Konstantin A. Lyssenko、Mikhail A. Syroeshkin、Gennady I. Nikishin、Igor V. Alabugin、Alexander O. Terent’ev
DOI:10.1021/acs.joc.8b02218
日期:2018.11.2
actones from silyl enol ethers, enol acetates, and cyclic acetals confirm that the β-peroxylactones indeed correspond to a deep energy minimum that connects a variety of the interconverting oxygen-rich species at this combined potential energy surface. The target β-hydroperoxy-β-peroxylactones were synthesized from β-ketoesters, and their silyl enol ethers, alkyl enol ethers, enol acetates, and cyclic
我们发现通过BF 3催化的各种无环前体,β-酮酸酯及其甲硅烷基烯醇醚,烷基烯醇醚,烯醇乙酸酯和环状缩醛与H 2 O的BF 3催化环化反应,可合成获得β-氢过氧-β-过氧内酯。2个。引人注目的是,与起始原料的选择无关,这些反应收敛于相同的β-氢过氧-β-过氧内酯产物,即先前难以捉摸的Baeyer-Villiger反应的环状Criegee中间体的过氧类似物。由甲硅烷基烯醇醚,烯醇乙酸酯和环状缩醛形成β-氢过氧-β-过氧内酯的计算热力学参数证实,β-过氧内酯确实对应于连接各种相互转化的富氧物种的最低能量最小值。在这个组合的势能面。由β-酮酸酯合成了目标β-氢过氧-β-过氧内酯,并以30-96%的收率获得了它们的甲硅烷基烯醇醚,烷基烯醇醚,烯醇乙酸酯和环状缩醛。这些反应在温和的条件下进行,即使在可以预期替代氧化途径的情况下,也可以选择性地形成多种选择性选择性形成的β-氢过氧-β-过氧内酯。这些β-