反应详情

1-(3-Dimethylamino-5-pentafluorosulfanyl phenyl)ethanone (650 mg) was dissolved in methanol (50 ml) and treated with stirring with trimethyl orthoformate (715 mg) and DL-10-camphorsulfonic acid (10 mg). After stirring for 3 h, more orthoformate (200 mg) was added, and the mixture was stirred for 2 h and then allowed to stand overnight. The solvent was then stripped off and the residue was dried in a high vacuum. 730 mg of crude product were obtained, which were reacted directly in the next stage.

1. additiontreated
2. stirringthe mixture was stirred for 2 h
3. waitto stand overnight
4. customthe residue was dried in a high vacuum