反应详情

N,N-Diisopropylethylamine (0.45 ml) was added to a solution of 2-chloropyridine-3-sulphonyl chloride (0.53 g) and 4-nitrophenol (0.35 g) in DMF (5 ml). The mixture was stirred at ambient temperature for 30 minutes then diluted with ethyl acetate (25 ml) and washed with water (2×25 ml), saturated sodium carbonate solution (3×20 ml), water (20 ml) and saturated sodium chloride solution. Aqueous layers were back-extracted with ethyl acetate (25 ml) and the organic layers were combined and dried (MgSO4). Volatile material was removed by evaporation to give 4-nitrophenyl 2-chloropyridine-3-sulphonate (0.52 g) as a solid, m.p. 127°-128° C.; 1H NMR (d6 -DMSO): 7.5 (d, 2 H), 7.7 (dd, 1 H), 8.3 (d, 2 H), 8.4 (dd, 1 H), 8.8 (dd, 1 H); mass spectrum (+ve FAB, NBAIDMSO): 315 (M+H)+.

1. washwashed with water (2×25 ml), saturated sodium carbonate solution (3×20 ml), water (20 ml) and saturated sodium chloride solution
2. extractionAqueous layers were back-extracted with ethyl acetate (25 ml)
3. dry with materialdried (MgSO4)
4. customVolatile material was removed by evaporation