反应详情

温度

120 °C

To a mixture of tert-butyl 4-(4-(4-(ethoxycarbonyl)-2-iodooxazol-5-yl)phenyl)piperazine-1-carboxylate (0.080 g, 0.15 mmol), 4-(4,4,5,5-tetramethyl-[1,3,2]-dioxaborolan-2-yl)-1H-indazole (0.080 g, 0.33 mmol) and sodium carbonate (0.048 g, 0.45 mmol) in toluene (0.81 ml), ethanol (0.49 ml) and water (0.23 ml) was added bis(triphenylphosphine)palladium (II) chloride (0.005 g, 0.007 mmol) and the resulting mixture heated in the microwave at 120° C. for 60 minutes followed by an additional 45 minutes. The reaction mixture was diluted with EtOAc and washed with 1M NaOH. The organic phase was passed through a MP-SH cartridge, dried over MgSO4 and the solvent removed in vacuo. The residue was purified by silica gel column chromatography using a 10-100% EtOAc in hexane gradient to afford tert-butyl 4-(4-(4-(ethoxycarbonyl)-2-(1H-indazol-4-yl)oxazol-5-yl)phenyl)piperazine-1-carboxylate (0.037 g, 0.07 mmol, 47%) as a yellow solid. LCMS (2) Rt: 3.57 min; m/z (ES+) 518.

1. washwashed with 1M NaOH
2. dry with materialdried over MgSO4
3. customthe solvent removed in vacuo
4. customThe residue was purified by silica gel column chromatography