反应详情

To a solution of Compound 44C (0.35 g, 1.9 mmol) in 90% EtOH (10 mL) was added calcium chloride (0.06 g, 0.55 mmol), followed by iron powder (0.56 g, 10 mmol). The resulting mixture was stirred at rt overnight, then filtered through a pad of Celite®, the pad washed with EtOAc, and the filtrate concentrated under reduced pressure. The residue was purified by flash chromatography using 10% Et2O/CH2Cl2 to give a light-brown solid (0.13 g, 43%). 1H NMR (CDCl3) 7.02 (br s, 2H), 7.28 (d, J=2.2 Hz, 1H), 8.16 (d, J=2.2 Hz, 1H); LC/MS m/z=154 [M+H]+.

1. filtrationfiltered through a pad of Celite®
2. washthe pad washed with EtOAc
3. concentrationthe filtrate concentrated under reduced pressure
4. customThe residue was purified by flash chromatography