反应详情

To a solution of 4.81 g (30 mmol) 2-methoxyethyl-3-oxobutanoate in 90 ml benzene are added 4.83 g (30 mmol) 3-(trifluoromethyl)aniline and 1.80 g (30 mmol) acetic acid. The mixture is stirred under reflux for four hours using a Dean-Stark trap to remove water. After removal of the solvent in vacuo, the residue is purified by preparative HPLC (column: YMC C18 ODS-AQ 250 mm×30 mm, 11 μm; solvent A: acetonitrile, solvent B: water; gradient: 0 min 10% A, 3 min 10% A, 11 min 90% A, 13 min 90% A, 13.2 min 10% A, 15 min 10% A; wavelength: 220 nm; injection volume: ca. 900 μl ethanol solution; number of injections: 9). The product containing fractions are combined and concentrated in vacuo.

1. temperatureunder reflux for four hours
2. customto remove water
3. customAfter removal of the solvent in vacuo
4. customthe residue is purified by preparative HPLC (column: YMC C18 ODS-AQ 250 mm×30 mm, 11 μm; solvent A: acetonitrile, solvent B: water; gradient: 0 min 10% A, 3 min 10% A, 11 min 90% A, 13 min 90% A, 13.2 min 10% A, 15 min 10% A; wavelength: 220 nm; injection volume: ca. 900 μl ethanol solution; number of injections: 9)
5. additionThe product containing fractions
6. concentrationconcentrated in vacuo