Ethylene Glycol → 2-(4-(4-methyl-6-((tetrahydro-2H-pyran-2-yl)oxy)-3-(3-((tetrahydro-2H-pyran-2-yl)oxy)phenyl)-2H-chromen-2-yl)phenoxy)ethanol

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-(4-iodophenyl)-4-methyl-6-((tetrahydro-2H-pyran-2-yl)oxy)-3-(3-((tetrahydro-2H-pyran-2-yl)oxy)phenyl)-2H-chromene (Intermediate 3, 1.0 g, 1.6 mmol), ethane-1,2-diol (0.49 g, 8.0 mmol), copper iodide (0.03 g, 0.16 mmol), 1,10-phenanthroline (0.058 g, 0.32 mmol), potassium carbonate (0.44 g, 3.2 mmol) in butyronitrile (3.2 mL) was degassed three times via nitrogen/vacuum cycles. The reaction mixture was heated at 125° C. for 2 days, allowed to cool to room temperature, and diluted with ethyl acetate. This mixture was filtered through Celite. The organic phase was washed twice with water, washed with brine, dried over Na2SO4, filtered, and concentrated to afford the crude product. This crude product was then purified by silica gel chromatography to give 2-(4-(4-methyl-6-((tetrahydro-2H-pyran-2-yl)oxy)-3-(3-((tetrahydro-2H-pyran-2-yl)oxy)phenyl)-2H-chromen-2-yl)phenoxy)ethanol. 1H NMR (DMSO-d6): δ 7.27-7.13 (m, 3H), 6.98 (t, 1H), 6.93-6.84 (m, 3H), 6.80-6.76 (m, 3H), 6.59 (d, 1H), 5.97 (d, 1H), 5.43 (dt, 1H), 5.34 (br, 1H), 4.79 (t, 1H), 3.88 (t, 2H), 3.80-3.70 (m, 2H), 3.64 (q, 2H), 3.54-3.50 (m, 2H), 2.06 (s, 3H), 1.86-1.66 (m, 6H), 1.59-1.51 (m, 6H).

Provenance & Evidence