反应详情

温度

-78 °C

An oven dried 20 ml scintillation vial containing N-(3-(3,6-dibromo-9H-carbazol-9-yl)-2-hydroxypropyl)-N-(3-methoxyphenyl)-4-nitrobenzenesulfonamide (18.3 mg, 0.027 mmol; see representative procedure 3 above) was purged with N2 and charged with anhydrous dichloromethane (1.5 ml, 0.018 M). The sealed vial was cooled in a dry ice acetone bath before the dropwise addition of diethylaminosulfur trifluoride (DAST, 7 ul, 0.053 mmol). The reaction temperature was maintained at −78° C. for an hour and then slowly warmed to room temperature and stirred overnight. The reaction was quenched with 2.0 ml of saturated NaHCO3 solution and diluted with 6 ml CH2Cl2 and extracted three times. The combined organics were dried over Na2SO4, filtered and condensed. Crude product carried forward. Quantitative yield.

1. customAn oven dried 20 ml scintillation vial
2. customwas purged with N2
3. additioncharged with anhydrous dichloromethane (1.5 ml, 0.018 M)
4. temperatureslowly warmed to room temperature
5. customThe reaction was quenched with 2.0 ml of saturated NaHCO3 solution
6. additiondiluted with 6 ml CH2Cl2
7. extractionextracted three times
8. dry with materialThe combined organics were dried over Na2SO4
9. filtrationfiltered
10. customcondensed