反应详情

To a suspension of 25.6 g (100 mmol) of 3-chloro-2,4,5-trifluoro-6-nitrobenzoic acid in 75 ml of dichloromethane was added 14.0 g (110 mmol) of oxalyl chloride. This mixture was treated with four drops of dry N,N-dimethylformamide, and the rapidly bubbling solution was stirred overnight at room temperature. The mixture was concentrated to give 27.0 g of the title compound which was used without purification in the next step.

1. concentrationThe mixture was concentrated