Related Products of 21461-84-7, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 21461-84-7, (S)-( )-5-Oxo-2-tetrahydrofurancarboxylic Acid, introducing its new discovery.
It is well recognized that carbon chirality plays a critical role in the design of drug molecules. However, very little information is available regarding the effect of stereoisomerism of macrocyclic bifunctional chelators (BFC) on biological behaviors of the corresponding radiopharmaceuticals. To evaluate such effects, three enantiopure stereoisomers of a copper radiopharmaceutical BFC bearing two chiral carbon atoms were synthesized in forms of R,R-, S,S-, and R,S-. Their corresponding peptide conjugates were prepared by coupling with a model peptide sequence, c(RGDyK), which targets the alphavbeta3 integrin for in vitro and in vivo evaluation of their biological behaviors as compared to the racemic conjugate. Despite the chirality differences, all the conjugates showed a similar in vitro binding affinity profile to the alphavbeta3 integrin (106, 108, 85 and 100 nM for rac-H2-1, RR-H2-1, SS-H 2-1, and RS-H2-1 respectively with all p values > 0.05) and a similar level of in vivo tumor uptake (2.72 ± 0.45, 2.60 ± 0.52, 2.45 ± 0.48 and 2.88 ± 0.59 for rac-64Cu-1, RR-64Cu-1, SS-64Cu-1, and RS-64Cu-1 at 1 h p.i. respectively). Furthermore, they demonstrated a nearly identical biodistribution pattern in major organs (e.g. 2.07 ± 0.21, 2.13 ± 0.58, 1.70 ± 0.20 and 1.90 ± 0.46 %ID/g at 24 h p.i. in liver for rac-64Cu-1, RR-64Cu-1, SS-64Cu-1, and RS- 64Cu-1 respectively; 1.80 ± 0.46, 2.30 ± 1.49, 1.73 ± 0.31 and 2.23 ± 0.71 at 24 h p.i. in kidneys for rac- 64Cu-1, RR-64Cu-1, SS-64Cu-1, and RS- 64Cu-1 respectively). Therefore we conclude that the chirality of BFC plays a negligible role in alphavbeta3-targeted copper radiopharmaceuticals. However, we believe it is still worthwhile to consider the chirality effects of BFCs on other targeted imaging or therapeutic agents.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Related Products of 21461-84-7. In my other articles, you can also check out more blogs about 21461-84-7
Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem