Cesium carbonate → 2-methyl-2-(4-((2-(2-methyl-1H-benzo[d]imidazol-1-yl)-4-morpholinofuro[3,2-d]pyrimidin-6-yl)methyl)piperazin-1-yl)propanamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-[4-(2-chloro-4-morpholin-4-ylfuro[3,2-d]pyrimidin-6-ylmethyl)piperazin-1-yl]isobutyramide (500 mg, 1.18 mmol), 2-methyl-1H-benzoimidazole (180 mg, 1.36 mmol), Pd2dba3 (27 mg, 0.029 mmol), Xphos (57 mg, 0.12 mmol) and cesium carbonate (580 mg, 1.78 mmol) in 1,4-dioxane (10 mL) was heated at 110° C. for 18 h. The reaction mixture was cooled to ambient temperature, then loaded onto an Isolute® SCX-2 cartridge, which 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, EtOAc:MeOH; gradient from 100:0 to 70:30) followed by trituration from hot EtOAc to afford 240 as a white solid (408 mg, 67%). LCMS (Method G): RT=5.23 min, M+H+=519. 1H NMR (CDCl3, 400 MHz) δ 8.03-7.98 (m, 1 H); 7.73-7.69 (m, 1 H); 7.28-7.23 (m, 2 H); 7.05 (bs, 1 H); 6.76 (s, 1 H); 5.27 (bs, 1 H); 4.08 (t, J=4.7 Hz, 4 H); 3.89 (t, J=4.7 Hz, 4 H); 3.76 (s, 2 H); 2.90 (s, 3 H); 2.62 (m, 8 H) and 1.24 (s, 6 H)

Provenance & Evidence