α-Acyloxynitroso dienophiles in [4+2] hetero Diels–Alder cycloadditions: mechanistic insights
作者:Géraldine Calvet、Susannah C. Coote、Nicolas Blanchard、Cyrille Kouklovsky
DOI:10.1016/j.tet.2010.02.065
日期:2010.4
alpha-Acyloxynitroso derivatives are a class of heterodienophiles leading to valuable 3,6-dihydro-1,2-oxazines or the corresponding aminoalcohols in good yields. The discovery that a beta-oxygenated moiety led to a domino [4+2] cycloaddition/sigma(N-O) bond cleavage in the presence of a catalytic amount of Lewis acid was investigated in detail, through kinetic profiling of the reaction both in the absence and presence of a promoter. These studies showed that the role of the Lewis acid was to accelerate the sigma(N-O) bond cleavage thereby promoting a highly reproducible sequence. In addition, our preliminary results on an asymmetric version of this domino sequence are reported. (C) 2010 Elsevier Ltd. All rights reserved.
Kropf,H.; Lambeck,R., Justus Liebigs Annalen der Chemie, 1966, vol. 700, p. 1 - 17
作者:Kropf,H.、Lambeck,R.
DOI:——
日期:——
p-Bromo(diacetoxyiodo)benzene, an Efficient Oxidant for Conversion of Oximes into Nitroso Compounds
作者:E. V. Zhutov、Yu. V. Skornyakov、M. V. Proskurina、N. S. Zefirov
DOI:10.1023/b:rujo.0000013147.86594.7c
日期:2003.11
The reaction of lead tetra-acetate with oximes. Part I. Alicyclic and aliphatic oximes
作者:J. W. Lown
DOI:10.1039/j29660000441
日期:——
Stable free radicals obtained by the action of leadtetra-acetate on the oximes of cyclopentanone, cyclohexanone, 4-butylcyclohexanone, acetone, heptan-2-one, and heptan-4-one are tentatively assigned structures corresponding to the addition of two acetoxy groups to the CN bond of the oximes, and are characterised by their electron paramagnetic resonance (e.p.r.) spectra. The corresponding acetoxy-nitroso