In situ Mo(CO)₆-based catalysts for alkyne metathesis: Silanols vs phenols as co-catalysts under thermal and photochemical activation
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DOI: 10.1016/j.catcom.2020.105944
Abstract: Abstract A systematic study on the use of silanols and phenols as effective activators in Mo(CO)₆ – based catalytic systems for metathesis of 4-decyne and 1-phenyl-1-propyne is reported. In comparison with traditionally used phenols, aryl-substituted… read more here.
Keywords: catalysts alkyne; silanols phenols; situ based; based catalysts ... See more keywords
Selective C(sp3)–H Bond Insertion in Carbene/Alkyne Metathesis Reactions. Enantioselective Construction of Dihydroindoles
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DOI: 10.1021/acscatal.8b02822
Abstract: A general access to chiral dihydroindole derivatives in high yields is achieved by C–H functionalization in a highly site- and enantioselective cascade reaction of propargyl diazoacetates. Highly site-selective intramolecular C(sp3)–H bond insertions are realized by… read more here.
Keywords: bond; insertion; bond insertion; carbene alkyne ... See more keywords
Productive Alkyne Metathesis with “Canopy Catalysts” Mandates Pseudorotation
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DOI: 10.1021/jacs.1c01404
Abstract: Molybdenum alkylidyne complexes of the “canopy catalyst” series define new standards in the field of alkyne metathesis. The tripodal ligand framework lowers the symmetry of the metallacyclobutadiene complex formed by [2 + 2] cycloaddition with… read more here.
Keywords: pseudorotation; metathesis canopy; productive alkyne; canopy catalysts ... See more keywords
Alkyne Metathesis with d2 Re(V) Alkylidyne Complexes Supported by Phosphino-Phenolates: Ligand Effect on Catalytic Activity and Applications in Ring-Closing Alkyne Metathesis.
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DOI: 10.1021/jacs.2c00368
Abstract: A family of d2 Re(V) alkylidyne complexes bearing two decorated phosphino-phenolates (POs) and a labile pyridine ligand were prepared that can efficiently promote alkyne metathesis reactions in toluene. The relative activity of these complexes varies… read more here.
Keywords: alkylidyne complexes; metathesis; activity; phosphino phenolates ... See more keywords
Classifying and Understanding the Reactivities of Mo-Based Alkyne Metathesis Catalysts from 95Mo NMR Chemical Shift Descriptors.
Sign Up to like & getrecommendations! Published in 2022 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.2c06252
Abstract: The most active alkyne metathesis catalysts rely on well-defined Mo alkylidynes, X3Mo≡CR (X = OR), in particular the recently developed canopy catalyst family bearing silanolate ligand sets. Recent efforts to understand catalyst reactivity patterns have… read more here.
Keywords: metathesis catalysts; chemical; chemical shift; alkyne metathesis ... See more keywords