Oxidation of aromatic aldehydes and ketones by H2O2/CH3ReO3 in ionic liquids: a catalytic efficient reaction to achive dihydric phenols

A convenient and efficient application of hydrogen peroxide/methyltrioxorhenium in ionic liquids [bmim]BF4 and [bmim]PF6 for the oxidation of hydroxylated and methoxylated benzaldehydes and acetophenones to the corresponding phenols is described. Good yields of products were obtained in short reaction times.