Oxidopyrylium-Alkene [5 + 2] Cycloaddition Conjugate Addition Cascade (C3) Sequences: Scope, Limitation, and Computational Investigations

Autor: Paul Wendelboe, Erica L. Woodall, Chunyin M. Law, Christian R. Zwick, Riley H. Kaufman, John R. Goodell, T. Andrew Mitchell, Christopher G. Hamaker, Justin A. Simanis, Henry B. Wedler, Dean J. Tantillo
Rok vydání: 2018
Předmět:
Zdroj: The Journal of Organic Chemistry. 83:9818-9838
ISSN: 1520-6904
0022-3263
DOI: 10.1021/acs.joc.8b01322
Popis: 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 experiments and theoretical calculations provide evidence for the proposed mechanistic pathway.
Databáze: OpenAIRE