33106-95-5Relevant articles and documents
Controlling the outcome of an N-alkylation reaction by using N-oxide functional groups
Pearson, Russell J.,Evans, Kathryn M.,Slawin, Alexandra M. Z.,Philp, Douglas,Westwood, Nicholas J.
, p. 5055 - 5061 (2005)
Covalent modifiers of proteins are of importance in chemical proteomics, an emerging chemical technology used to assign protein function. In this study, high-field 1H NMR techniques were used to analyze the reaction of the bioactive compound, 2,3-bis(bromomethyl)quinoxaline 1,4-dioxide, with amines (a model system for proteins containing nitrogen-based nucleophiles). Unexpectedly, the results show that a double nucleophilic substitution reaction involving 2 equiv of the amine is preferred to an intramolecular cyclization pathway. A direct comparison with the reaction carried out on a substrate lacking the N-oxide functional groups is also provided. X-ray crystal structures and computational studies are used to rationalize the observed differences in reactivity between the two systems.
