Triethylamine → 4-(6-Methoxy-[1,5]naphthyridin-4-ylcarbamoyl)-piperidine-1-carboxylic acid benzyl ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of acid (d) (7.9 g, 30 mmol) and triethylamine (4.2 ml, 3.03 g, 30 mmol) in N,N-dimethylformamide (50 ml) was treated with [O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate] (HATU) (9.5 g, 25 mmol). After 0.25 hours, amine (c) (3.5 g, 20 mmol) was added and the mixture heated at 50° C. overnight. Evaporation afforded an oil which was partitioned between ethyl acetate and dilute brine. Drying and evaporation afforded an oil (10 g) which was chromatographed on silica eluting with a 0–5% methanol in ethyl acetate gradient, affording an oil (6.0 g, 80%).

Herkunft & Nachweise