2045-76-3Relevant academic research and scientific papers
SYNTHESIS OF SOME SUBSTITUTED PYRROLINE-1-OXIDES BY CATALYTIC HYDROGENATION OF ALIPHATIC GAMMA-NITROVCARBONYL COMPOUNDS
Turner, Marvin J.,Luckenbach, Lee A.,Turner, Elizabeth L.
, p. 1377 - 1386 (2007/10/02)
Various pyrroline-1-oxides were prepared by the catalytic hydrogenation of appropriately substituted gamma-nitrocarbonyl compounds.Initially the reaction affords a mixture of the nitrone and the corresponding hydroxilamine, but copper(II)-catalyzed aerial oxidation readily converts the hydroxylamine to the desired cyclic nitrone.This method was found to be more convenient than the zinc-ammonium chloride reduction and the corresponding yields were comparable.
ADDITION 1-3 D'HYDROSILANES ET STANNANES SUR DIVERSES NITRONES : RADICAUX NITROXYDES α-METALLES R3M-C-N.-O ET O- ET C-METALLA-HYDROXYLAMINES R3M-O-N-C-H ET R3M-C-N-OH
Riviere, Pierre,Richelme, Suzanne,Riviere-Baudet, Monique,Satge, Jacques,Riley, Paul I.,et al.
, p. 1663 - 1683 (2007/10/02)
Free radical 1,3-addition of silanes or stannanes to various nitrones generally leads to corresponding O-organometallohydroxylamines.The α-metallonitroxide radicals =-M-C-N.-O, obtained by trapping silyl or stannyl-centred radicals with an appropriate nitrone, have been characterised by e.s.r. spectroscopy.The O-stannylhydroxylamines are generally sufficiently stable to be isolated by distillation under vacuum.The less stable O-germyl or O-silylhydroxylamines decompose readily upon heating or by photolysis by competing intra- and intermolecular processes.Under special conditions favouring the formation of silylanions (MeNO2, NEt3), a competitive 1,3-dipolar addition of phenyldichloro- or trichlorosilane with the nitrone leads to the unstable C-metallohydroxylamine =-M-C-N-OH .
