Sodium Carbonate → tert-butyl 4-(5-amino-6-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrazin-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate

Participants

Reaction Steps

5-bromo-3-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrazin-2-amine (150 mg, 0.4715 mmol), tert-butyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-2H-pyridine-1-carboxylate (189.5 mg, 0.6130 mmol) and sodium carbonate (707.0 μL of 2 M, 1.414 mmol) in DMF (1.500 mL) were heated to 120° C. for 45 min in the microwave. After this time the reaction mixture was diluted with water (5 mL) and ethyl acetate (5 mL) and the layers separated. Organic layer washed with water (3×5 mL), dried (MgSO4) and concentrated in vacuo to leave the title compound as a yellow/orange solid (175.6 mg, 88% yield). 1H NMR (400 MHz, DMSO) d 1.44 (s, 9H), 2.60 (m, 2H), 3.57 (m, 2H), 4.06 (m, 2H), 6.70 (s, 1H), 7.30 (br s, 2H), 7.69 (m, 2H), 7.77 (m, 1H), 8.25 (m, 2H) and 8.51 (1H, s) ppm; MS (ES+) 421.02

Provenance & Evidence