119421-12-4Relevant academic research and scientific papers
Sulphinamoylacetates as sulphine precursors. Mechanism of basic hydrolysis and scheme of irreversible inactivation of cinnamoyl alcohol dehydrogenase, an enzyme of the lignification process
Baltes, Michel,Cazaux, Louis,Gorrichon, Liliane,Maroni, Pierre,Tisnes, Pierre
, p. 1473 - 1478 (2007/10/02)
t-Butyl N-arylsulphinamoylacetates are hydrolysed in aqueous basic media by an elimination mechanism. It takes place on the conjugate base of the substrate resulting from a fast deprotonation of the activated methylene group. This elimination is first order (E1cB) for compounds where strong electron-withdrawing groups substitute the aromatic ring. For substitution by weaker electron-withdrawing or -donating groups, the elimination is second order, and needs the presence of general acid catalysis. For t-butyl N-(2-hydroxyphenyl)sulphinamoylisobutyrate where this mechanism of elimination is impossible, a BAc2 attack by hydroxide ion at the sulphur atom takes place. From these mechanisms and the results of complexation of zinc(II) cations by sulphinamoylacetates, a possible scheme for the irreversible inactivation of the title zinc metalloenzyme is proposed.
