the role of Isotope labeling in organic chemistry
Dorota Jakubczyk
Karlsruhe Institute of
Technology (KIT), Kaiserstraße 12,
76131 Karlsruhe
dorota.jakubczyk@kit.edu
The use of isotope labels in organic chemistry has a fundamentally
important role in the determination of mechanisms of reactions. There are
several ways to use isotopes in mechanistic investigations, e.g. introduction
of isotopes can enable control the experiment and “follow” where they go or
don’t go [1].
Another important application of isotopes is the study of kinetic
isotope effects (KIEs) and equilibrium isotope effect
(EIEs), so the study of how much slower (or faster) a labelled molecules reacts
than unlabeled material. Thus kinetic isotope effects provide unique data
unavailable from other methods, since information about the transition state of
a reaction is obtained.
One of the most convenient isotope used in mechanistic as well as in KIE
studies is 2H (deuterium). Deuterium labeled reagents are cheap,
save and commercially available. Deuterium-labeled compounds have several
important applications in many branches of science [2] e.g. in the
investigation of biological activity [3] or in the analysis of drug metabolism.
Literatura:
[1] Bullock
R. M., Bender B. R.: Encyclopedia of Catalysis, 2000,
Brookhaven National Lab., Upton, NY (US), 1-62.
[2] Sajiki H., Esaki H., Aoki F., Maegawa T., Hirota K.: Synlett 2005, 9, 1385-1388.
[3] Kai
K., Tani A., Hayashi H.: Bioorg. Med. Chem. 2010, 18, 3776.