Intriguing substituent effect in modified Hoveyda–Grubbs metathesis catalysts incorporating a chelating iodo-benzylidene ligand
作者:Michał Barbasiewicz、Krzysztof Błocki、Maura Malińska、Robert Pawłowski
DOI:10.1039/c2dt32422a
日期:——
A series of modified Hoveyda–Grubbs catalysts incorporating a chelating iodo-benzylidene ligand were prepared and characterized. The presence of electron-withdrawing ring substituents in the para position to the iodide was found to decrease the catalytic activity, revealing that dissociation of the Ru⋯I–Ar bond is not the rate-determining step.
制备并表征了一系列改性的结合了碘代亚苄基配体的Hoveyda-Grubbs催化剂。发现在碘化物对位的吸电子环取代基会降低催化活性,这表明Ru⋯I–Ar键的解离不是决定速率的步骤。