Rapid Decomposition of Olefin Metathesis Catalysts by a Truncated N-Heterocyclic Carbene: Efficient Catalyst Quenching and N-Heterocyclic Carbene Vinylation
Sign Up to like & getrecommendations! Published in 2018 at "ACS Catalysis"
DOI: 10.1021/acscatal.8b03123
Abstract: The Grubbs methylidene RuCl2(PCy3)2(═CH2) GIm is immediately decomposed by the small N-heterocyclic carbene (NHC) tetramethylimidazol-2-ylidene (IMe4), even at −80 °C. Labeling experiments with RuCl2(PCy3)2(═13CH2) reveal capture of the methylidene ligand as ethylimidazolium chloride [13CH313CH2–IMe4]Cl, A*.… read more here.
Keywords: rapid decomposition; carbene; decomposition olefin; olefin metathesis ... See more keywords
Rapid Decomposition of 99mTc-MAA Complex During Lung Perfusion Imaging.
Sign Up to like & getrecommendations! Published in 2019 at "Clinical Nuclear Medicine"
DOI: 10.1097/rlu.0000000000002643
Abstract: A 30-year-old woman with a recent episode of dyspnea was presented. The lung perfusion scan using Tc-MAA (macro-aggregated albumin) initially revealed an acceptable lung-to-background activity ratio implying a proper radiopharmaceutical preparation and radiolabeling efficiency. Unexpectedly,… read more here.
Keywords: perfusion; rapid decomposition; maa; lung perfusion ... See more keywords