6,7‐Benzotropolone Syntheses Based on Ring‐Closing Metatheses and Four‐Electron Oxidations

Four homoallyl ortho‐vinylaryl ketones (10a‐d) – 1,8‐dienes of sorts – were prepared by several approaches. In the presence of 1–2 mol‐% Grubbs‐II catalyst, they ring‐closed to give 6,7‐dihydrobenzocyclohepten‐5‐ones (11a‐d) in 90–96 % yield. With SeO2 the parent compound (11a) delivered benzocycloh...

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Veröffentlicht in:	European journal of organic chemistry 2020-05, Vol.2020 (19), p.2929-2955
Hauptverfasser:	Kreibich, Michael, Gemander, Manuel, Peter, David, Yadav, Dharmendra B., de Koning, Charles B., Fernandes, Manuel A., Green, Ivan R., van Otterlo, Willem A. L., Brückner, Reinhard
Format:	Artikel
Sprache:	eng
Schlagworte:	Cascade chemical reactions Catalysts Dienes Isomerization Ketones Lithium Non‐benzenoid aromatics Oxygen Ring‐closing metathesis Selenium dioxide Substitutes Tropolone
Online-Zugang:	Volltext
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