5-Bromoimidazo(1,2-a)pyridine → 4-(1-((2-(Imidazo[1,2-a]pyridin-5-yl)-4-morpholinothieno[3,2-d]pyrimidin-6-yl)methyl)piperidin-4-yl)morpholine

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-morpholin-4-yl-6-(4-morpholin-4-ylpiperidin-1-ylmethyl)-2-(tributylstannanyl)thieno[3,2-d]pyrimidine (69 mg, 0.10 mmol), 5-bromoimidazo[1,2-a]pyridine (24 mg, 0.12 mmol), Pd(PPh3)4(11 mg, 0.01 mmol) and copper(I) iodide (23 mg, 0.12 mmol) in THF (1 mL) was purged with argon gas then heated at 140° C., for 20 min, in a microwave reactor. The reaction mixture was loaded onto an Isolute® SCX-2 cartridge (10 g). The cartridge was washed with MeOH then the product was eluted with 2 M NH3 in MeOH. The appropriate fractions were evaporated and the resulting residue was purified by flash chromatography (Si—PPC, MeOH:DCM, gradient 0:100 to 3:97) followed by reverse phase HPLC (Phenomenex Gemini 5u C18, 20 mM triethylamine in water on a gradient of acetonitrile 70:30 to 2:98) to give 687 as a white solid (22 mg, 42%). LCMS (Method F): RT 3.90 min; [M+H]+ 520. 1H NMR (400 MHz, CHCl3-d): δ 9.23 (s, 1 H); 7.95 (dd, J=7.2, 1.2 Hz, 1 H); 7.77 (d, J=8.9 Hz, 1 H); 7.75 (d, J=1.2 Hz, 1 H); 7.35 (s, 1 H); 7.31 (dd, J=8.9, 7.2 Hz, 1 H); 4.07 (t, J=4.7 Hz, 4 H); 3.91 (t, J=4.7 Hz, 4 H); 3.84 (s, 2 H); 3.74 (t, J=4.4 Hz, 4 H); 3.05 (d, J=11.4 Hz, 2 H); 2.57 (t, J=4.4 Hz, 4 H); 2.29-2.19 (m,1 H); 2.15 (t, J=11.4 Hz, 2 H); 1.87 (d, J=12.5 Hz, 2 H); 1.65-1.59 (m, 2 H)

Provenance & Evidence