Sodium borohydride → 2-Amino-5-(1-hydroxyethyl)benzenesulfonamide
反応式
[C:1]([C:4]1[CH:5]=[CH:6][C:7]([NH2:14])=[C:8]([S:10]([NH2:13])(=[O:12])=[O:11])[CH:9]=1)(=[O:3])[CH3:2].[BH4-].[Na+]>CCO>[NH2:14][C:7]1[CH:6]=[CH:5][C:4]([CH:1]([OH:3])[CH3:2])=[CH:9][C:8]=1[S:10]([NH2:13])(=[O:11])=[O:12]参加物
4
反応条件
- 温度
- 25 °C
実験手順
5-Acetyl-2-aminobenzenesulfonamide (see compound 13) (0.95 g, 4.4 mmol) was suspended in 96% o EtOH (50 ml) and NaBH4 (0.46 g, 12 mmol) was added in one portion. The mixture was stirred at 25° C. for 4 h and filtered through Celite and the solvent was removed under reduced pressure. The residue was treated with sat. NaHCO3 (50 ml) and extracted with EtOAc (2×50 ml), dried (Na2SO4) and evaporated to dryness. Flash-chromatography with EtOAc:n-hexane:Et3N (200:100:4, v/v/v) as eluent gave 0.35 g (37%) of 2-amino-5-(1-hydroxyethyl)benzenesulfonamide as light-brown powder. M.p. 160-162° C.