Ammonia → 2-Piperidinecarboxamide, (R)-

Temperatur

60 °C

(2R)-2-(Methoxycarbonyl)piperidinium chloride (2.6 g, 14.5 mmol) was dissolved in ammonia (0.88M, 30 ml). The reaction mixture was heated at 60° C. for 1.5 hr. The mixture was partitioned between ethyl acetate (100 ml) and sodium hydroxide (1N, 100 ml, 100 mmol), the aqueous was washed with ethyl acetate (3×100 ml). The combined organic layers were dried over sodium sulphate and the solvent evaporated under reduced pressure. Aqueous layer was acidified with hydrochloric acid and evaporated to dryness under reduced pressure. The resultant white solid was triturated with dichloromethane:methanol (9:1), the remaining solid was removed by filtration and the filtrate evaporated under reduced pressure to afford the title compound as a white solid, 1.14 g, (61%).

1. washthe aqueous was washed with ethyl acetate (3×100 ml)
2. dry with materialThe combined organic layers were dried over sodium sulphate
3. customthe solvent evaporated under reduced pressure
4. customevaporated to dryness under reduced pressure
5. customThe resultant white solid was triturated with dichloromethane:methanol (9:1)
6. customthe remaining solid was removed by filtration
7. customthe filtrate evaporated under reduced pressure

ORD-Eintrag

ord-6b05b9ff31d7460dac6248c34588548c

Quelldatensatz

uspto-grants-2001_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06180627B2