反应详情

温度

0 °C

0.1 mol (21.2 g) of 4,5-methylenedioxy-1,2-dinitrobenzene is added to a solution of 0.12 mol (16.8 ml) of triethylamine, 0.4 mol of sodium methylate (72 g of a 30% strength solution in methanol) and 60 ml of methanol. The mixture is heated for 10 minutes at the refluxing temperature of the methanol. After the mixture has been cooled to 0° C., the phenate of the expected product is drained. The phenate is dissolved in 300 ml of water at 60° C. The solution is filtered on paper in order to remove a resin. On cooling and neutralization of the filtrate with acetic acid, the expected product precipitates. After being dried, the 4,5-dinitro-2-methoxyphenol thereby obtained is recrystallized from isopropanol. It melts at 172° C. (literature: 177° C.).