反应详情

45 g of 4-chloro-3-nitro-benzotrifluoride, dissolved in 150 ml of methanol, are initially introduced. 80 g of an ion exchanger resin containing quaternary ammonium groups are then introduced, the mixture is stirred for 10 minutes, 100 g of 50% strength sodium hydroxide solution are added dropwise, up to a maximum temperature of 70° C., and the mixture is stirred at 65° C. for 8 hours. After cooling the mixture, it is acidified with concentrated hydrochloric acid, the ion exchanger is filtered off and the crude product is distilled with steam. 27 g of 2-nitro-4-trifluoromethylphenol are obtained. nD20 : 1.5003.

1. additionare initially introduced
2. additionare then introduced
3. stirringthe mixture is stirred at 65° C. for 8 hours
4. temperatureAfter cooling the mixture, it
5. filtrationthe ion exchanger is filtered off
6. distillationthe crude product is distilled with steam