4325-24-0Relevant articles and documents
Quaternary ammonium ions can externally block voltage-gated K+ channels. Establishing a theoretical and experimental model that predicts KDS and the selectivity of K+ over Na+ ions
Wempe
, p. 63 - 78 (2007/10/03)
The physicochemical basis for the high ion selectivity of potassium channels is poorly understood. In the present studies, external blockade of cloned voltage-gated potassium channels with alkyl quaternary ammonium ions are analyzed from a model derived from theory and experimental data. Atomic mass units, electrostatic potential residing on the nitrogen atom, the COSMO van der Waals solvent accessible surface, the Onsager solvation model, and the isodensity PCM solvation model are computed at the semi-empirical and the ab initio levels of theory. A structure-activity relationship (SAR) exists between the calculated values and the experimentally obtained KD (mM). The SAR model gives us KD predictions and when K+ and Na+ are incorporated into the model, it dramatically predicts the selectivity of K+ over Na+ ions.
Formation of Alkylurethanes from Carbon Dioxide by Regioselective O-Alkylation of Alkali-metal N,N-Diethylcarbamates in the Presence of Complexing Agents
Belforte, Antonio,Calderazzo, Fausto
, p. 1007 - 1010 (2007/10/02)
Alkali-metal N,N,-diethylcarbamates undergo N-alkylation with MeI, giving tertiary amine and carbon dioxide, in addition to MI; however O-alkylation with formation of alkylurethane occurs preferentially in the presence of a polyfunctional complexing agent.