反应详情

22 g (67 mmol) of 4-nitro-benzoic acid-N-phenyl-N-(2-methoxycarbonylethyl)-amide were hydrogenated in 500 ml of methanol with 2 g of 10% palladium on charcoal at 3 bar hydrogen pressure for 3 hours. After filtration and distillation of the solvent the reaction mixture was washed with 100 ml of ether and the white crystalline product was further reacted directly. Yield: 18.6 g (94% of theory), Rf value: 0.70 (silica gel; methylene chloride/ethanol=19:1)

1. filtrationAfter filtration and distillation of the solvent the reaction mixture
2. washwas washed with 100 ml of ether
3. customthe white crystalline product was further reacted directly