[Br:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][S:9]([CH2:12][CH2:13][CH2:14]Cl)(=[O:11])=[O:10])=[CH:4][CH:3]=1.C([O-])([O-])=O.[Cs+].[Cs+]>CN(C=O)C.CCOCC>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:14][CH2:13][CH2:12][S:9]2(=[O:11])=[O:10])=[CH:4][CH:3]=1N-(4-Bromophenyl)-3-chloropropane-1-sulfonamide (1.0 g, 3.2 mmol) was dissolved in DMF, Cs2CO3 (1.56 g, 4.8 mmol) was added, and the mixture was stirred for 3 hours. The mixture was then diluted with ether, washed with water, 2N HCl, brine, dried over MgSO4, and concentrated. The crude product was purified via Isco chromatography (the Redisep® column, silica, gradient 5-60% ethyl acetate in hexane) to afford 0.65 g (74%) 2-(4-bromophenyl)isothiazolidine 1,1-dioxide.
Wird geladen…
