反应详情

100 g of 5-(2-chloro-4-trifluoromethyl-phenoxy)-2-nitrobenzyl alcohol were dissolved in 370 ml of nitromethane. A mixture of 86.4 g of 65% strength nitric acid and 43.2 g of water was then added dropwise in the course of 90 minutes to this solution, at 60° to 65° C., and the mixture was stirred for 8 hours at 60° to 65° C. It was then diluted with 4 liters of water, and the product was filtered off. 50.2 g (50% of theory) of 5-(2-chloro-4-trifluoromethyl-phenoxy)-2-nitro-benzaldehyde, of melting point 95° C., were obtained.

1. additionwas then added dropwise in the course of 90 minutes to this solution, at 60° to 65° C.
2. filtrationthe product was filtered off