29644-34-6Relevant academic research and scientific papers
NMR Study of Topomerization of N-Aroyl-p-Benzoquinonemonoimines
Pirozhenko, V. V.,Avdeenko, A. P.
, p. 1514 - 1519 (2007/10/03)
The N-aroyl-p-benzoquinonemonoimines are studied by the 1H and 13C NMR spectroscopy.The barriers of degenerate Z,E-isomerization are measured.A considerable decrease in the barriers compared to other types of benzoquinone imines is due to interaction between the orbital of the unshared electron pair of nitrogen and ?* orbital of the C=O bond.Proceeding from the analysis of chemical shifts in the 13C NMR spectra and quantum-chemical calculations the lack of conjugation between the ?-electronic systems of p-benzoquinonimine and aryl fragments and the noncoplanar structure of the studied compounds are deduced.
NEW 1,1-AMINO HYDROPEROXIDES FROM REGIOSELECTIVE OXYGENATION OF 4-(N-ARYLMETHYLENEAMINO)-2,6-DI-t-BUTYLPHENOLS.
Nishinaga, A.,Shimizu, T.,Matsuura, T.
, p. 1265 - 1268 (2007/10/02)
The oxygenation of 4-(N-arylmethyleneamino)-2,6-di-t-butylphenols with Co(Salpr), a five coordinate Co(II) Schiff base complex, in CH2Cl2 results in the regioselective hydroperoxylation at the imino carbon to give N-(1-aryl-1-hydroperoxymethyl)-3,5-di-t-butyl-p-benzoquinone monoimines, which give exclusively the corresponding amides and 2,6-di-t-butyl-p-benzoquinone in an aerobic solution of KOH in 90percent EtOH.
