Sodium Carbonate → 4-((4-(Isopropylamino)-5-(5-(morpholinomethyl)-1,3,4-oxadiazol-2-yl)pyridin-2-yl)amino)benzonitrile

Participants

Reaction Conditions

Reaction Steps

To solution of 2-chloro-N-isopropyl-5-(5-(morpholinomethyl)-1,3,4-oxadiazol-2-yl)pyridin-4-amine (47) (100 mg, 0.2 mmol) in dioxane (5 mL): H2O (1 mL), 4-cyano aniline (0.3 mmol, 1.1 equiv.), xanthphos (0.1 mmol, 0.5 equiv.) and Na2CO3 (0.8 mmol, 3 equiv.) were added and degassed for 10 min. To the reaction mixture Pd2(dba)3 (0.1 mmol, 0.5 equiv.) was added and degassed again for 10 min. It was then heated at 110° C. for overnight. The reaction mass was cooled and filtered through small pad of celite. The filtrate obtained was concentrated to provide crude material. The crude material was purified by column chromatography through silica gel and MeOH: DCM as eluent. The material obtained was repurified on preparative TLC to afford 4-((4-(isopropylamino)-5-(5-(morpholinomethyl)-1,3,4-oxadiazol-2-yl)pyridin-2-yl)amino)benzonitrile. 1H NMR: 400 MHz, CD3OD: δ 1.37 (d, J=6.40 Hz, 6H), 2.67 (t, J=4.8 Hz, 4H), 3.77 (t, J=4.4 Hz, 4H), 3.87 (q, J=6.4 Hz, 1H), 3.94 (s, 2H), 6.24 (s, 1H), 7.61-7.64 (m, 2H), 7.72 (d, J=6.4 Hz, 1H), 7.77-7.80 (m, 2H), 8.57 (s, 1H). LC/MS: XBridge Phe 8, 4.6×30 mm, 3.5 μm; Solvent A=2% ACN: 98% H2O: 10 mM NH4COOH; Solvent B=98% ACN: 2% H2O: 10 mM NH4COOH; gradient 0-100% B over 1.5 min (3.2 min run time); retention time: 1.595 min; LCMS (ES-API), m/z 420.0 (M+H). HPLC: Sunfire C18 (150×4.6 mm), 3.5 micron; Solvent A=5% ACN: 95% H2O: 0.05% TFA pH=2.5; Solvent B=95% ACN: 5% H2O: 0.05% TFA pH=2.5; gradient 0-100% B over 15 min (23 min run time); Flow rate: 1.0 μL/min; Retention time: 5.964 min; Purity: 95.1%.

Provenance & Evidence