The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1038-95-5, Name is Tri-p-tolylphosphine, molecular formula is C21H21P. In a Article，once mentioned of 1038-95-5, Recommanded Product: Tri-p-tolylphosphine
Four trifluoroborate derivatives of phosphonium cations 2a?d were radiolabeled with fluorine-18 (18F) and evaluated for imaging myocardial perfusion with positron emission tomography (PET). Tracers were radiolabeled simply via18F?19F isotope exchange reaction in acidic (pH 2) aqueous solution. On average, [18F]2a?d were obtained in 10?17% non-decay-corrected radiochemical yield with 25.9?48.1 GBq/mumol specific activity, and >96% radiochemical purity. In vitro stability study showed no decomposition of [18F]2a?d after being incubated in mouse plasma for up to 2 h. Myocardial uptake in mice was visualized in PET images by using [18F]2b?d but not [18F]2a. [18F]2a?d were stable against in vivo defluorination as no significant bone uptake was observed. Despite sub-optimal heart uptake of [18F]2b?d, we successfully demonstrated that18F?19F isotope exchange reaction on trifluoroborates could be a promising strategy for the design of potential18F-labeled tracers even for intracellular targets.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Recommanded Product: 1038-95-5, you can also check out more blogs about1038-95-5
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate