反应详情

Triphenylsulfonium bromide (343 mg; 1 mmol), ethyl orthoformate (296 mg; 2 mmol), and 4-trifluoromethylbenzenesulfonic acid (271 mg; 1.2 mmol) were dissolved in methylene chloride (10 ml), and the mixture was stirred for 6 hours at room temperature. The reaction mixture was alkalinized by adding 1% aqueous ammonia (10 ml), and subjected to extraction with methylene chloride three times, followed by drying. The solvent was removed through distillation, to thereby yield solid matter. The solid matter was washed and stirred in ether, to thereby yield 375 mg of the target compound as white crystals (yield: 76%).

1. extractionsubjected to extraction with methylene chloride three times
2. customby drying
3. customThe solvent was removed through distillation
4. customto thereby yield solid matter
5. washThe solid matter was washed
6. stirringstirred in ether