Catalytic oxidation of 2-aminomethylphenols by FeCl2/Fe(o)/O2.II
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Sparfel,Baranne-Lafont,Cuong,Capdevielle,Maumy
p. 803 - 814
(2007/10/02)
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New oxygen-activating systems for dehydrogenation of 2-hydroxymethyl phenols 1 (a: R = tBu ; b: R = CH3; c : R = H) to the corresponding salicylaldehydes 3 are described. These systems are composed of a transition metal (M0 = Fe0 or Cu0), a transition metal ion (MnCln=Fe11Cl2 or Cu1Cl) in catalytic amount and molecular oxygen. The most active systems are Fe0FeCl2O2CH3OH and Cu0CuCl + FeCl2O2CH3OH. Based on all the results so far obtained a mechanistic hypothesis is proposed.
Sparfel, Daniel,Baranne-Lafont, Joele,Cuong, Nguyen Kim,Capdevielle, Patrice,Maumy, Michel
p. 793 - 802
(2007/10/02)
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