Tetrahedron p. 793 - 802 (1990)
Update date:2022-07-31
Topics:
Sparfel, Daniel
Baranne-Lafont, Joele
Cuong, Nguyen Kim
Capdevielle, Patrice
Maumy, Michel
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.
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(1990)
