反应详情

To a solution of 2-[(12S)-3-chloro-8-thia-4,6-diazatricyclo[7.4.0.0[2,7]]trideca-1(9),2(7),3,5-tetraen-12-yl]ethan-1-ol (300 mg, 1.12 mmol, 1.00 equiv) in 5 mL of distilled DMF was added TBSCl (252 mg, 1.50 equiv) and imidazole (137 mg, 2.01 mmol, 1.80 equiv) at room temperature under nitrogen. The resulting solution was stirred for 1 h at ambient temperature and then quenched with water, extracted with 3×50 mL of ethyl acetate. The combined organic layers were washed with brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:5) to provide (12S)-12-[2-[(tert-butyldimethylsilyl)oxy]ethyl]-3-chloro-8-thia-4,6-diazatricyclo[7.4.0.0[2,7]]trideca-1(9),2(7),3,5-tetraene (420 mg, 98%) as a light yellow solid. MS: m/z 384, 386 (M+H)+.

1. customquenched with water
2. extractionextracted with 3×50 mL of ethyl acetate
3. washThe combined organic layers were washed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated under reduced pressure