反应详情

190 g (0 82 mole) Ethyl 1-nitromethyl-1-cyclohexaneacetate in 3168 mL ethanol are hydrogenated for 4 hours at 125° C. in the presence of 62.9 g 10% palladium-carbon. At the end of the take up of hydrogen, the catalyst is filtered off and the colorless solution obtained is distilled to dryness in a vacuum. 116.2 g 2-Aza-spiro[4,5]decan-3-one in the form of a colorless crystallizate are obtained; yield 91.6% of theory. Content 97.1% (GC); m.p. 88° to 90° C.

1. filtrationAt the end of the take up of hydrogen, the catalyst is filtered off
2. customthe colorless solution obtained
3. distillationis distilled to dryness in a vacuum