反应详情

Bromine (20.5 g, 0.13 mol) in 20 ml of carbon tetrachloride is added slowly to a solution of 4-trifluoromethylthiotoluene (29 g, 0.15 mol) in 90 ml of carbon tetrachloride heated to gentle reflux under a 275 W sunlamp. When the addition is complete, the solution is maintained at reflux for one hour. Most of the solvent is removed at atmospheric pressure, then the residue is vacuum distilled. The 15.5 g cut with boiling point 64°-77° C./0.6-0.8 mm is 92% monobromo compound by glc.

1. temperatureheated
2. temperatureto gentle reflux under a 275 W sunlamp
3. additionWhen the addition
4. temperaturethe solution is maintained
5. temperatureat reflux for one hour
6. customMost of the solvent is removed at atmospheric pressure
7. distillationdistilled