反应详情

温度

4 °C

To a solution of 4-chloro-3-sulfamoyl-benzoic acid ethyl ester (46.95 g, 166 mmol) in 500 mL of dry tetrahydrofuran is added dropwise, with stirring, 199 mL of a 2 M solution of lithium borohydride in tetrahydrofuran. The mixture is stirred and refluxed for 5 hr, then left at room temperature for 18 h, and is then carefully diluted with 400 mL of water. The mixture is cooled to 4° C. for 24 hours and filtered to yield 32.7 g (82%) of the title compound as an off-white solid.

1. stirringThe mixture is stirred
2. temperaturerefluxed for 5 hr
3. filtrationfiltered