Synthesis of [13C5] and [carbonyl-14C]-5-chlorofuran-2-carboxylic acid
作者:Peter N. Dorff、Mark E. Powell、Charles S. Elmore
DOI:10.1002/jlcr.1829
日期:2011.3
biologically relevant compounds need to be developed. Furans are frequently encountered in bioactive molecules, and a good synthesis of labeled furan is found in the literature. We required a relatively uncommon labeled furan, 5-chloro-2-furoic acid, for investigative work labeled with C-13 and C-14. Carboxylation of the lithium anion of [13C4]furan with 13CO2 followed by chlorination using benzyltrimethylammonium
MK 3814 is a potent and selective antagonist of the A2a receptor. A2a receptor antagonists have the potential for the treatment of Parkinson disease. Three distinct isotopically labelled forms of MK 3814 were synthesized. [3H]MK 3814 was prepared for a preliminary absorption, distribution, metabolism, and excretion data (ADME) evaluation of the compound and [14C]MK 3814 for more definitive ADME work, including an absorption, metabolism, and excretion study in man. In addition, [2H4]MK 3814 was prepared as an internal standard for a liquid chromatography mass spectrometry bioanalytical method. This paper discusses the synthesis of 3 isotopically labelled forms of MK 3814.
Synthesis of 14C-Labeled C60, Its Suspension in Water, and Its Uptake by Human Keratinocytes
作者:Walter A. Scrivens、James M. Tour、Kim E. Creek、Lucia Pirisi
DOI:10.1021/ja00089a067
日期:1994.5
We describe how, in order for us to determine whether unfunctionalized parent C[sub 60] had any biological activity, we synthesized [sup 14]C-labeled C[sub 60], developed a method to produce a fine aqueous suspension of the labeled material, and then monitored the uptake of the labeled C[sub 60] by human cells. The C[sub 60] became rapidly cell-associated, though it did not affect the proliferation