反应详情

A solution of 2,6-diiodo-4-nitrophenol (10 g, 25.6 mmol), ethynylcyclopropane (1.9 g, 28.8 mmol) and Cu2O (1.9 mg, 13.2 mmol) in 100 mL of dry pyridine was refluxed for 2 h. The reaction mixture was poured into 1 L of water and stirred for 10 min. The resulting mixture was filtered. The cake was purified by column chromatography on silica gel eluting with EtOAc/PE (0-20%) to give the title compound (6.6 g, 78% yield) as a yellow solid. 1H NMR (CDCl3, 400 MHz): δ 8.47 (d, J=2.4 Hz, 1H), 8.32 (d, J=2.4 Hz, 1H), 6.58 (s, 1H), 2.13-2.07 (m, 1H), 1.14-1.04 (m, 4H).

1. filtrationThe resulting mixture was filtered
2. customThe cake was purified by column chromatography on silica gel eluting with EtOAc/PE (0-20%)