反应详情

A solution of 2-(3-bromo-phenyl)-2-nitro-propane-1,3-diol (6.79 g, 24.59 mmol) in 100 ml of EtOH was hydrogenated in the presence of 5 g of Raney-Ni. When the take-up of hydrogen had ceased, the mixture was filtered through Celite, and the filtrate was chromatographed on silica gel (EtOAc/MeOH/25% aqueous NH3, 5%) to give the title compound in the form of a colourless solid. TLC (EtOAc/MeOH/25% aqueous NH3, 5%): Rf=0.24; HPLC: RtH2=2.354 min; 1H-NMR (400 MHz, CD3OD): 7.73 (s, 1H), 7.50 (d, 1H), 7.44 (d, 1H), 7.29 (t, 1H), 3.79 (d, 2H), 3.72 (d, 2H); MS: 246, 248 [(M+H)+].

1. filtrationthe mixture was filtered through Celite
2. customthe filtrate was chromatographed on silica gel (EtOAc/MeOH/25% aqueous NH3, 5%)