反应详情

A toluene solution (20 mL) of 7-4 (181 mg, 0.48 mmol), 2-5 (171 mg, 0.60 mmol) and Et3N (266 μl, 1.9 mmol) was refluxed for 3 h and then concentrated to dryness. The residue was purified by flash chromatography (silica, 3:2 CH2Cl2 /acetone) to provide 7-5 as a colorless gum.

1. concentrationconcentrated to dryness
2. customThe residue was purified by flash chromatography (silica, 3:2 CH2Cl2 /acetone)