反应详情

Thionyl chloride (15.7 g, 120 mmol) was added to a solution of 3-bromo-5-nitrobenzoic acid in toluene (100 ml). The mixture was refluxed for 6 hours. The solvent was evaporated and the residue dissolved in dry tetrahydrofuran (50 ml), ethanol (10 ml) was added and the mixture stirred at room temperature for 30 mins. The solvent was evaporated and the residue chromatographed in dichloromethane to give the title compound as an off-white solid (13 g, 79%)

1. temperatureThe mixture was refluxed for 6 hours
2. customThe solvent was evaporated
3. dissolutionthe residue dissolved in dry tetrahydrofuran (50 ml)
4. additionethanol (10 ml) was added
5. customThe solvent was evaporated
6. customthe residue chromatographed in dichloromethane