TETRAHYDRO-4-OXO-2H-PYRAN-3-SULFONAMIDE

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-Oxotetrahydropyran-3-sulfonamide (1.09 g) was dissolved in 2:1 THF/methanol (110 ml), sodium borohydride (0.23 g) was added in portions and the mixture was stirred at room temperature for 18 hours. Concentrated hydrochloric acid was then used to set the pH to 2 and then the solvent was removed under reduced pressure. The residue was purified by chromatography (solvent: dichloromethane/methanol). This gave the product (0.65 g) with a molecular weight of 181.2 g/mol (C5H11NO4S). was added in portions the solvent was removed under reduced pressure The residue was purified by chromatography (solvent: dichloromethane/methanol)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 1.09 g of 4-oxotetrahydropyran-3-sulfonamide were dissolved in THF, 0.23 g of sodium borohydride was added and the mixture was stirred at room temperature for 18 hours. The mixture was then adjusted to pH=2 with hydrochloric acid and concentrated under reduced pressure. The residue, bound to 8 g of Celite, was purified by means of a silica gel column (50 g): solvent A: dichloromethane, B: methanol, gradient: 0 min 3% B, 3 min 3% B, 5 min 5% B, 35 min 10% B, 44 min 10% B; flow rate 20 ml/min; detection: 220 nm, fraction size: 20 ml. After removal of the solvent under reduced pressure, the product was thus obtained with impurities. The residue (615 mg) was used further without further workup. concentrated under reduced pressure was purified by means of a silica gel column (50 g) 0 min 3% B, 3 min 3% B, 5 min 5% B, 35 min 10% B, 44 min 10% B After removal of the solvent under reduced pressure the product was thus obtained with impurities

反应条件: temp:-40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 1.3 g of 4-(3,6-dihydro-2H-pyran-4-yl)morpholine were dissolved under argon in 12 ml of THF, the mixture was cooled to −40° C., and then 1.3 g of sulfamoyl chloride were added, followed by 6 ml of diisopropylamine. The cooling was removed and, after the mixture had come to room temperature, it was stirred for another 2 hours. An oil separated out. The THF was decanted off, and the residue was taken up in methanol and filtered through silica gel. The filtrate was concentrated under reduced pressure and the residue, bound to 12 g of Celite, was purified by means of a silica gel column (50 g): solvent A: dichloromethane, B: methanol, gradient: 0 min 2% B, 3 min 2% B, 5 min 5% B, 35 min 10% B, 45 min 10% B; flow rate 20 ml/min; detection: 220 nm, fraction size: 20 ml. After removal of the solvent under reduced pressure, the product was thus obtained with impurities. The residue (1.09 g) was used further without further workup. The cooling was removed had come to room temperature An oil separated out The THF was decanted off filtered through silica gel The filtrate was concentrated under reduced pressure was purified by means of a silica gel column (50 g) 0 min 2% B, 3 min 2% B, 5 min 5% B, 35 min 10% B, 45 min 10% B After removal of the solvent under reduced pressure the product was thus obtained with impurities