1.1: sodium nitrite; hydrogenchloride / water / 0.5 h / 0 - 5 °C 1.2: 4 h / 5 - 20 °C 2.1: dihydrogen peroxide; sodium carbonate / acetone / 1 h / 5 - 20 °C 3.1: bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine / 0.25 h / 20 °C / |Inert atmosphere 4.1: trifluorormethanesulfonic acid / toluene / 0.05 h / |Microwave irradiation View Scheme

hydroxylamine hydrochloride; sodium hydrogencarbonate in ethanol; water 8 h; Reflux;

sulfuric acid; glycerol; m-nitrobenzene sulfonic acid sodium salt