反应详情

16.6 g (130 mmol) oxalyl chloride are added to 15.0 g (65 mmol) 2-(4-bromo-phenyl)-propionic acid (Bioorg. Med. Chem. Lett. 2010, 20, 887) in 75 mL DCM at 0° C. The cooling is removed and the mixture is stirred for 2 h under reflux. After that time, the solvent is evaporated and the residue is taken up in 70 mL THF. 3.20 g (39 mmol) ethylamine hydrochloride and 66.0 g (655 mmol) TEA are added and the mixture is stirred for 16 h at rt. After that time, iced water is added, the mixture is extracted with EtOAc and the organic layer is dried over sodium sulphate. The solvent is evaporated and the residue is purified by column chromatography (silica gel).

1. customThe cooling is removed
2. temperatureunder reflux
3. customAfter that time, the solvent is evaporated
4. stirringthe mixture is stirred for 16 h at rt
5. extractionthe mixture is extracted with EtOAc
6. dry with materialthe organic layer is dried over sodium sulphate
7. customThe solvent is evaporated
8. customthe residue is purified by column chromatography (silica gel)