反应详情

To a solution of 2,5-dibromothiazole (2.0 g, 8.23 mmol) in DMF (15 mL) was added K2CO3 (1.16 g, 8.40 mmol) followed by benzyl mercaptan (1.07 g, 8.40 mmol) in DMF (10 mL) over a period of 20 min. The reaction mixture was stirred at RT for over night. After this time, the reaction mixture was diluted with water and extracted in EtOAc. The combined organic layers were dried over Na2SO4, filtered and concentrated under reduced pressure. The resulting crude product was purified by silica gel chromatography (0.2% EtOAc in hexane) to yield 2-(benzylthio)-5-bromothiazole (2.3 g, 97.5% yield) as a brown solid. 1H NMR (400 MHz, DMSO-d6, δ): 7.56 (s, 1H); 7.25-7.36 (m, 5H); 4.39 (s, 2H). 1H LCMS Method V: Retention time 2.319 min, [M+1]=286.

1. extractionextracted in EtOAc
2. dry with materialThe combined organic layers were dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe resulting crude product was purified by silica gel chromatography (0.2% EtOAc in hexane)