Three propenoidic phenols, E-methyl ferulate, E-4-hydroxycinnamic acid methyl ester and E-3-chloro-4-hydroxycinnamic acid methyl ester, were oxidized with dioxygen, in the presence of N,N'-ethylenebis(salicylideneiminato)cobalt(II) [Cosalen]. The yields of conversion to oxidized products depended on the reaction solvent and on the substituents on the phenyl ring. EPR and electronic investigations suggest that an organometallic radical acts as the intermediate active species.
Bolzacchini, E., Chiavetto, L., Canevali, C., Morazzoni, F., Orlandi, M., Rindone, B. (1996). Oxidation of propenoidic phenols catalysed by N,N'-ethylenebis(salicylideneiminato)cobalt(II) [Cosalen]: Reactivity and spectroscopic studies. JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL, 112(3), 347-351 [10.1016/1381-1169(96)00110-0].
Oxidation of propenoidic phenols catalysed by N,N'-ethylenebis(salicylideneiminato)cobalt(II) [Cosalen]: Reactivity and spectroscopic studies
BOLZACCHINI, EZIO;CANEVALI, CARMEN;MORAZZONI, FRANCA;ORLANDI, MARCO EMILIO;RINDONE, BRUNO
1996
Abstract
Three propenoidic phenols, E-methyl ferulate, E-4-hydroxycinnamic acid methyl ester and E-3-chloro-4-hydroxycinnamic acid methyl ester, were oxidized with dioxygen, in the presence of N,N'-ethylenebis(salicylideneiminato)cobalt(II) [Cosalen]. The yields of conversion to oxidized products depended on the reaction solvent and on the substituents on the phenyl ring. EPR and electronic investigations suggest that an organometallic radical acts as the intermediate active species.
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