Methanesulfonic Acid → 1-(3,5-Dioxapiperidin-1-yl)sulphonyl-4-nitrobenzene

関与物質

反応条件

反応手順

4-Nitrobenzenesulphonamide (2.02 g, 10 mmol) was added to a solution of 1,3,5-trioxane (1.96 g, 20 mmol) in acetic acid (5 ml). The mixture was cooled for 5 minutes ated methanesulphonic acid (10 ml) was added slowly. The mixture was then stirred at 35° C. for 20 minutes, cooled to 0° C., diluted with water and extracted with ethyl acetate. The combined extracts were washed twice with water and twice with 5% aqueous sodium hydrogen carbonate solution, then dried and the volatiles removed by evaporation. The residue was recrystallized from ethanol to give the title compound (955 mg, 35%). NMR: 4.87 (s, 2H), 5.30 (s, 4H), 8.20 (d, 2H), 8.42 (d, 2H).

情報源と証拠