反应详情

A solution of 20 mmol 6-chloro-5-hydroxy-2,2-dimethyl-benzofuran-3-one in 30 ml toluene is admixed with 10 mmol Lawesson's reagent and heated for 3 hours to boiling under reflux. After cooling to room temperature it is filtered on 50 g silica gel. The red fraction of the filtrate is collected. After removing the toluene by distillation a red oil remains.

1. temperatureheated for 3 hours
2. temperatureunder reflux
3. filtrationis filtered on 50 g silica gel
4. customThe red fraction of the filtrate is collected
5. customAfter removing the toluene
6. distillationby distillation a red oil