反应详情

Methyl 5-(3,4,5,6-tetramethoxy-2-methylbenzyl)-2-hydroxybenzoate (0.510 g, 1.18 mmol) was dissolved in methylene chloride (12 ml) and after adding thereto in sequence copper acetate (0.215 g, 1.18 mmol), phenylboronic acid (0.289 g, 2.37 mmol), Molecular Sieves 4A (0.300 g), triethylamine (0.299 g, 2.96 mmol) and pyridine (0.234 g, 2.96 mmol), the solution was stirred at room temperature for 12 hours. The reaction solution was filtered and the filtrate was poured into water and then extracted with methylene chloride. The extract was washed with saturated brine, then dried and concentrated. The obtained residue was purified by silica gel column chromatography (hexand:ethyl acetate=3:1) to obtain the titled compound (0.220 g, 0.487 mmol, 41%).

1. additionafter adding
2. filtrationThe reaction solution was filtered
3. additionthe filtrate was poured into water
4. extractionextracted with methylene chloride
5. washThe extract was washed with saturated brine
6. customdried
7. concentrationconcentrated
8. customThe obtained residue was purified by silica gel column chromatography (hexand:ethyl acetate=3:1)