5-Bromoimidazo(1,2-a)pyridine → HCID 59605843, compound

Participants

Reaction Steps

A mixture of 4-morpholin-4-yl-6-(3-morpholin-4-yl-azetidin-1-ylmethyl)-2-tributylstannanylfuro[3,2-d]pyrimidine (227 mg, 0.35 mmol), 5-bromoimidazo[1,2-a]pyridine (84 mg, 0.43 mmol), tetrakis(triphenylphosphine)palladium (40 mg, 10 mol %) and CuTC (16 mg, 24 mol %) in 1,4-dioxane (4 mL) was purged with argon gas then subjected to microwave irradiation at 140° C. for 30 min. The reaction mixture was loaded onto an Isolute® SCX-2 cartridge (10 g); the cartridge was washed with MeOH/DCM before the desired product was eluted with 2 M NH3 in MeOH/DCM. The product was collected and concentrated in vacuo. The resultant residue was purified by flash chromatography (Si—PPC, DCM:NH3/MeOH (2 M); gradient from 100:0 to 96:4)), followed by reverse phase HPLC (Phenomenex Gemini 5u C18, 20 mM triethylamine in water on a gradient of acetonitrile 95:5 to 2:98) to afford 250 as a cream foam (79 mg, 47%). LCMS (Method G): RT=3.22 min, M+H+=476. 1H NMR (CDCl3, 400 MHz) δ 9.14 (s, 1 H); 7.87 (dd, J=7.2, 1.2 Hz, 1H); 7.77 (d, J=8.9 Hz, 1 H); 7.74 (d, J=1.2 Hz, 1 H); 7.31 (dd, J=8.9, 7.2 Hz, 1 H); 6.76 (s, 1 H); 4.10 (t, J=4.7 Hz, 4 H); 3.89 (t, J=4.7 Hz, 4 H); 3.84 (s, 2 H); 3.74 (t, J=4.5 Hz, 4 H); 3.62 (t, J=6.2 Hz, 2 H); 3.15-3.02 (m, 3 H) and 2.35 (m, 4 H)

Provenance & Evidence