Hydrochloric Acid → ethyl 6-{[(3R)-1-(tert-butoxycarbonyl)-3-piperidinyl]amino}-5-chloronicotinate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of ethyl 5,6-dichloronicotinate (10.0 g) and N,N-diisopropylethylamine (17.4 mL) in 1,3-dimethyl-2-imidazolidinone (100 mL) was added tert-butyl (3R)-3-amino-1-piperidinecarboxylate (10.9) at ambient temperature and the mixture was stirred at 100° C. for 9 hr. The reaction mixture was poured into a mixture of AcOEt and water. The separated organic layer was added ice-water and the mixture was adjusted to pH 3.5 with 1N-HCl. The separated organic layer was washed with water, dried over magnesium sulfate and evaporated in vacuo to give ethyl 6-{[(3R)-1-(tert-butoxycarbonyl)-3-piperidinyl]amino}-5-chloronicotinate (16.74 g).

Herkunft & Nachweise