反应详情

1-Benzyloxycarbonyl-4-[N-(2-methoxyethyl)carbamoyl]piperidine [5.76 g, m.p. 85°-86°, Analysis %: C, 63.9; H, 7.5; N, 8.4; Calculated: C, 63.7; H, 7.6; N, 8.8; prepared similarly to Preparation C but using toluene in place of chloroform and starting from 1-benzyloxycarbonylpiperidine-4-carboxylic acid chloride and 2-methoxyethylamine] in ethanol (75 ml) was hydrogenated over 5% palladium on charcoal at 50 p.s.i./50°. The catalyst was removed by filtration, and the filtrate evaporated to give 4-[N-(2-methoxyethyl)carbamoyl]piperidine as an oil which solidified on standing. I.r. and n.m.r. spectra were consistent with this structure and the product was used in Example 7 without further purification.

1. customprepared similarly to Preparation C
2. custom50°
3. customThe catalyst was removed by filtration
4. customthe filtrate evaporated