反应详情

2-Bromomethyl-benzaldehyde (11 g, 55.26 mmol) in acetonitrile (132 ml) was added to a solution of (4-Hydroxy-3-iodo-phenyl)-acetic acid methyl ester (16.06 g, 55 mmol), K2CO3 (8.36 g, 60.50 mmol) and Nal (2.07 g, 13.80 mmol) in acetonitrile (88 ml). The mixture was heated to reflux temperature and was stirred at this temperature for 3 hours. Once the mixture cooled down to room temperature, it was filtered and was then concentrated to dryness to obtain a residue that was diluted in toluene (212 ml) and then it was washed with NaOH 0.05N. Once the layers had separated, the aqueous layer was washed with toluene (100 ml) again and the organic layers were washed with water (2×100 ml, 1×50 ml), were concentrated to dryness to obtain a residue, which was then diluted with a mixture of acetone-water at 30° C. Then the mixture was cooled until 20-22° C. The solid formed was filtered to obtain 18 g (80%) of [4-(2-Formyl-benzyloxy)-3-iodo-phenyl]-acetic acid methyl ester (98%HPLC).

1. temperatureThe mixture was heated
2. temperatureto reflux temperature
3. filtrationit was filtered
4. concentrationwas then concentrated to dryness
5. customto obtain a residue that
6. washit was washed with NaOH 0.05N
7. customOnce the layers had separated
8. washthe aqueous layer was washed with toluene (100 ml) again
9. washthe organic layers were washed with water (2×100 ml, 1×50 ml)
10. concentrationwere concentrated to dryness
11. customto obtain a residue, which
12. temperatureThen the mixture was cooled until 20-22° C
13. customThe solid formed
14. filtrationwas filtered