Oxidopyrylium-Alkene [5 + 2] Cycloaddition Conjugate Addition Cascade (C<sup>3</sup>) Sequences: Scope, Limitation, and Computational Investigations
作者:Riley H. Kaufman、Chunyin M. Law、Justin A. Simanis、Erica L. Woodall、Christian R. Zwick、Henry B. Wedler、Paul Wendelboe、Christopher G. Hamaker、John R. Goodell、Dean J. Tantillo、T. Andrew Mitchell
DOI:10.1021/acs.joc.8b01322
日期:2018.9.7
Oxidopyrylium-alkene [5 + 2] cycloaddition conjugate addition cascade (C3) sequences are described. Intramolecular cycloadditions involving terminal alkenes, enals, and enones were investigated. Substrates with tethers of varying lengths delivered five- and six-membered carbocycles and heterocycles thus demonstrating the scope and limitation of the cycloaddition–conjugate addition cascade. Several
描述了氧吡啶鎓-烯烃[5 + 2]环加成共轭加成级联(C 3)序列。研究了涉及末端烯烃,烯醛和烯酮的分子内环加成反应。带有不同长度束缚的底物传递了五元和六元碳环和杂环,从而证明了环加成-共轭加成级联反应的范围和局限性。若干实验和理论计算为提出的机制途径提供了证据。