反应详情

To dry dimethylformamide (50 ml)solution of 22.5 g (67.9 mmol)of [5-(3,5-dichlorophenylthio)-4-isopropyl-1-methyl-1H-imidazol-2-yl]methanol (Compound I-8)was added 25.0 ml of thionyl chloride, and the mixture was stirred at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure, and to the residue, ethyl acetate was added and extracted. The extract was neutralized with a saturated aqueous sodium hydrogen carbonate solution and dried over magnesium sulfate. The solvent was distilled off under reduced pressure to give 23.7 g of 2-chloromethyl-5-(3,5-dichlorophenylthio)-4-isopropyl-1-methylimidazole (28a)(yield about 100%). mp 110-111° C.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. additionto the residue, ethyl acetate was added
3. extractionextracted
4. dry with materialdried over magnesium sulfate
5. distillationThe solvent was distilled off under reduced pressure