methyl 2-(4-hydroxy-3-iodophenyl)acetate

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 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). The mixture was heated to reflux temperature it was filtered was then concentrated to dryness to obtain a residue that it was washed with NaOH 0.05N Once the layers had separated the aqueous layer was washed with toluene (100 ml) again the organic layers were washed with water (2×100 ml, 1×50 ml) were concentrated to dryness to obtain a residue, which Then the mixture was cooled until 20-22° C The solid formed was filtered