Water → HCID 61720969, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of Example 36a (22.5 g, 68.2 mmol), iron powder (19.04 g, 341 mmol), and ammonium chloride (7.30 g, 136 mmol) in tetrahydrofuran (117 mL), ethanol (117 mL), and water (39.0 mL) was heated under reflux at 100° C. for 2 hours. The reaction mixture was cooled to just below reflux temperature, filtered through celite, and the filter cake washed with warm methanol (3×50 mL). The resulting solution was concentrated under reduced pressure and then neutralized to a pH of 8 with saturated sodium hydrogen carbonate (150 mL). The mixture was extracted with ethyl acetate (3×100 mL). The combined organics were washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, filtered, and concentrated. The residue was purified by flash chromatography (silica gel, ethyl acetate/hexane gradient 0-15%) to provide the title compound (16.8 g, 82% yield).

Provenance & Evidence