Molybdenum-Catalyzed Cross-Coupling of Benzyl Alcohols: Direct C–OH Bond Transformation via [2 + 2]-Type Addition and Elimination

Traditional cross-couplings catalyzed by transition metal catalysts generally rely on the classic oxidative addition–transmetalation–reductive elimination process, which requires low-valent precious metals and an inert atmosphere and which initiates from carbon–alide or pesudo carbon–halide bonds. H...

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Veröffentlicht in:Organic letters 2022-06, Vol.24 (23), p.4218-4223
Hauptverfasser: Zhou, Pan, Li, Yuqiang, XU, Tao
Format: Artikel
Sprache:eng
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Zusammenfassung:Traditional cross-couplings catalyzed by transition metal catalysts generally rely on the classic oxidative addition–transmetalation–reductive elimination process, which requires low-valent precious metals and an inert atmosphere and which initiates from carbon–alide or pesudo carbon–halide bonds. Herein, an unprecedented molybdenum–oxo-complex-catalyzed intermolecular cross-coupling of benzyl alcohols has been reported. Various alcohols including primary, secondary, and tertiary substrates can proceed efficiently under these conditions. Several functional groups sensitive to the low-valent transition metals, such as aryl halides, can be well tolerated. The mechanistic studies and DFT calculations suggest that an intramolecular concerted cyclization was involved in the reverse [2 + 2]-type elimination process.
ISSN:1523-7060
1523-7052
DOI:10.1021/acs.orglett.2c01537