Synthesis of metathesis catalysts with fluorinated unsymmetrical N,N’-diaryl imidazoline-based NHC ligands
New olefin metathesis catalysts bearing unsymmetrical fluorinated NHC ligands with hexafluoroisopropylmethoxy group in ortho-positions of N-aryl-substituent have been synthesized. The effects of mono-ortho-arylsubstitution and the replacement of para-meth
Masoud, Salekh M.,Topchiy, Maxim A.,Peregudov, Alexander S.,Roisnel, Thierry,Dixneuf, Pierre H.,Bruneau, Christian,Osipov, Sergey N.
For detecting metal ions with 19F chemical exchange saturation transfer magnetic resonance imaging (19F CEST MRI), a class of novel fluorinated chelators with diverse fluorine contents and chelation properties were conveniently synthesized on gram scales. Among them, a DTPA-derived chelator with high sensitivity and selectivity was identified as a novel 19F CEST imaging probe for simultaneously detecting multiple metal ions.
HYPERVALENT RADIOACTIVE ASTATINE OR IODINE COMPOUNDS, AND PREPARATION METHODS THEREOF
The present invention relates to a compound having formula (I): wherein: - X is in particular 125I Or 211At; - R1 and R'1 are independently from each other chosen preferably from the group consisting of electron
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(2011/09/14)
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