The product of Example 201A (200 mg, 0.3233 mmol), ammonium chloride (113 mg, 2.118 mmol), and iron powder (111 mg, 1.988 mmol) in a mixture of water (3 mL), ethanol (6 mL) and tetrahydrofuran (6 mL) was heated at 80° C. under a nitrogen atmosphere for 75 minutes. The reaction was cooled to room temperature, diluted with ethyl acetate (100 mL), and washed with water (2×50 mL) and brine (50 mL). The organic was dried over anhydrous sodium sulfate, filtered, and concentrated by rotary evaporation in vacuo to give the product as a light beige solid (175 mg, 92%).
