Tetrahydrofuran → 5-(6-Chloro-2-morpholin-4-ylpyrimidin-4-yl)pyridin-2-ylamine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

THF (130 mL) and aq. Na2CO3 (2M, 40 mL, 80 mmol) were added to a glass pressure vessel containing 4,6-dichloro-2-morpholinopyrimidine (prepared as in Method 22; 4.5 g, 19.2 mmol) and 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine (4.7 g, 21.2 mmol). The resulting mixture was stirred and sparged with argon for 1-2 minutes. The catalyst, dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloromethane adduct (1.26 g, 1.54 mmol), was then added in one portion. After sealing the reaction vessel, the reaction was heated at 85° C. for 1 hour with stirring. Upon cooling to RT, the THF was removed under reduced pressure to leave a viscous residue. EtOAc (450 mL) and water (50 mL) were added. After vigorously stirring for 1-2 minutes, the solids were filtered off and washed with EtOAc (100 mL). The organic layer was separated and the aqueous layer was extracted with EtOAc (100 mL). The combined organic layers were washed with saturated NaCl solution (1×50 mL), dried with Na2SO4, filtered and evaporated under reduced pressure. The crude material was further purified by silica gel chromatography to give 5-(6-chloro-2-morpholin-4-yl-pyrimidin-4-yl)-pyridin-2-ylamine (2.48 g, 44%). LC/MS (m/z): 292.1 (MH+), Rt 2.06 minutes.

Herkunft & Nachweise