Oximes carbon-centred radicals

Cobalt(II)-bis((Z)-2-hydroxy-5,5-dimethyl-1 -(4-methylpiperazin-l -yl)hex-2-ene-1,4-dione) efficiently catalyses the aerobic oxidative 5-exo cyclization of )5,) -unsaturated oximes to give isoxazolines. Carbon-centred radicals are generated in the basic cyclization step. The predominant oxidative products of the reaction carried out in the presence of i-PrOH and TBHP are (16), whereas reductive products (17) are selectively obtained when the reaction is carried out in toluene in the presence of cyclohexa-1, 4-diene. " ... 

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