反应详情

To a solution of 2-[[2-chloro-5-(1-hydroxy-1-methyl-ethyl)-phenyl]-(3,4-dimethoxy-benzenesulfonyl)-amino]-N,N-diethyl-acetamide (0.527 g, 1 mmol) in DCM (10 mL) was added at 0° C. NEt3 (0.88 mL, 6 eq) and DMAP (7 mg). Methane sulfonylchloride (0.123 mL, 1.5 eq) was added and the mixture warmed to RT and stirred for 6 h. The mixture was partitioned between DCM and water. The aqueous phase was once more extracted with DCM and the combined organic layers dried over MgSO4 and concentrated. The residue was purified by chromatography on SiO2 (hex/EA 1:1, EA, EA/MeOH 9:1) to give the title compound as a colourless solid (0.186 g, 37%). Unreacted starting material (0.29 g, 55%) was also recovered.

1. customThe mixture was partitioned between DCM and water
2. extractionThe aqueous phase was once more extracted with DCM
3. dry with materialthe combined organic layers dried over MgSO4
4. concentrationconcentrated
5. customThe residue was purified by chromatography on SiO2 (hex/EA 1:1, EA, EA/MeOH 9:1)