Morpholine → 5-Morpholinopyridin-3-amine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a stirred solution of 5-bromopyridin-3-amine (1.5 g, 8.67 mmol), X-Phos (0.33 g, 0.69 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.32 g, 0.35 mmol) and morpholine (3.78 g, 43.3 mmol) in THF (17.3 mL) was added a 1.0M solution of lithium bis(trimethylsilyl)amide in THF (47.7 mL, 47.7 mmol). The resulting mixture was heated to 65° C. and stirring continued for 3 h. After which, the reaction was cooled to rt and then poured into water (100 mL) and extracted with EtOAc (2×150 mL) and DCM (2×150 mL). The combined organic layers were dried over magnesium sulfate, filtered and concentrated in vacuo. The crude product was purified by column chromatography on silica gel (0 to 100% DCM in EtOAc) to give 5-morpholinopyridin-3-amine. Mass Spectrum (ESI) m/e=180.1 (M+1).

Herkunft & Nachweise