反应详情

To a suspension of 10% palladium-on-carbon catalyst (3 g) in water (100 ml), a solution of N-formyl-4-(3-azidopropyl)-piperidine (19.6 g) in ethyl acetate (100 ml) was added. Hydrogen was passed through the mixture, and the pH was maintained at 3.0 by simultaneous addition of 1 N hydrochloric acid. When the consumption of acid ceased, the catalyst was filtered off, and the two layers separated. The aqueous phase was extracted twice with 25 ml portions of ethyl acetate, and thereafter evaporated to dryness in vacuo. The residue was dissolved in propanol-2, filtered, and the filtrate taken to dryness. The residue was treated with acetonitrile, and the crystals were filtered off and washed with acetonitrile followed by ether to give the title compound with m.p. 141°-143° C.

1. customWhen the consumption of acid
2. filtrationthe catalyst was filtered off
3. customthe two layers separated
4. extractionThe aqueous phase was extracted twice with 25 ml portions of ethyl acetate
5. customevaporated to dryness in vacuo
6. dissolutionThe residue was dissolved in propanol-2
7. filtrationfiltered
8. additionThe residue was treated with acetonitrile
9. filtrationthe crystals were filtered off
10. washwashed with acetonitrile