Ethyl Acetate → 2-(1-Methyl-1h-imidazol-4-yl)-4-[(6-nitro-3-pyridinyl)oxy]pyridine

Participants

Reaction Conditions

Reaction Steps

A mixture of Example A1 (1.5 g, 5.96 mmol), N-methyl-4-(tributylstannyl)imidazole (3.32 g, 8.94 mmol) and Pd(PPh3)4 (0.344 g, 0.298 mmol) in toluene (30 mL) sparged with Ar and heated at 110° C. overnight. The mixture was cooled to RT, treated with 10% KF and EtOAc, stirred at RT for 2 h, the solids removed via filtration through diatomaceous earth and washed with 5% MeOH/DCM. The layers of the filtrate were separated and the organic layer was washed with brine, dried over Na2SO4, concentrated to dryness and purified via silica gel chromatography (MeOH/DCM). The material was washed with a small amount of Et2O and dried to afford 2-(1-methyl-1H-imidazol-4-yl)-4-((6-nitropyridin-3-yl)oxy)pyridine (1.61 g, 91%). 1H NMR (400 MHz, Acetone-d6): δ 8.54 (d, J=2.8 Hz, 1H), 8.50 (d, J=5.6 Hz, 1H), 8.44-8.43 (m, 1H), 7.98 (dd, J=8.9, 2.8 Hz, 1H), 7.69 (d, J=1.4 Hz, 1H), 7.62 (d, J=2.6 Hz, 1H), 7.55 (s, 1H), 6.97 (dd, J=5.6, 2.6 Hz, 1H), 3.81 (s, 3H); MS (ESI) m/z: 298.1 (M+H+).

Provenance & Evidence